diff --git a/c++/greptime/v1/region/server.pb.cc b/c++/greptime/v1/region/server.pb.cc
index c7f2b47a..940f53e3 100644
--- a/c++/greptime/v1/region/server.pb.cc
+++ b/c++/greptime/v1/region/server.pb.cc
@@ -155,7 +155,6 @@ PROTOBUF_CONSTEXPR CreateRequest::CreateRequest(
   , /*decltype(_impl_.engine_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.path_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.region_id_)*/uint64_t{0u}
-  , /*decltype(_impl_.create_if_not_exists_)*/false
   , /*decltype(_impl_._cached_size_)*/{}} {}
 struct CreateRequestDefaultTypeInternal {
   PROTOBUF_CONSTEXPR CreateRequestDefaultTypeInternal()
@@ -428,7 +427,6 @@ const uint32_t TableStruct_greptime_2fv1_2fregion_2fserver_2eproto::offsets[] PR
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::CreateRequest, _impl_.engine_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::CreateRequest, _impl_.column_defs_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::CreateRequest, _impl_.primary_key_),
-  PROTOBUF_FIELD_OFFSET(::greptime::v1::region::CreateRequest, _impl_.create_if_not_exists_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::CreateRequest, _impl_.path_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::CreateRequest, _impl_.options_),
   ~0u,  // no _has_bits_
@@ -539,18 +537,18 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 63, -1, -1, sizeof(::greptime::v1::region::QueryRequest)},
   { 72, 80, -1, sizeof(::greptime::v1::region::CreateRequest_OptionsEntry_DoNotUse)},
   { 82, -1, -1, sizeof(::greptime::v1::region::CreateRequest)},
-  { 95, -1, -1, sizeof(::greptime::v1::region::DropRequest)},
-  { 102, 110, -1, sizeof(::greptime::v1::region::OpenRequest_OptionsEntry_DoNotUse)},
-  { 112, -1, -1, sizeof(::greptime::v1::region::OpenRequest)},
-  { 122, -1, -1, sizeof(::greptime::v1::region::CloseRequest)},
-  { 129, -1, -1, sizeof(::greptime::v1::region::AlterRequest)},
-  { 140, -1, -1, sizeof(::greptime::v1::region::AddColumns)},
-  { 147, -1, -1, sizeof(::greptime::v1::region::DropColumns)},
-  { 154, -1, -1, sizeof(::greptime::v1::region::AddColumn)},
-  { 162, -1, -1, sizeof(::greptime::v1::region::DropColumn)},
-  { 169, -1, -1, sizeof(::greptime::v1::region::FlushRequest)},
-  { 176, -1, -1, sizeof(::greptime::v1::region::CompactRequest)},
-  { 183, -1, -1, sizeof(::greptime::v1::region::RegionColumnDef)},
+  { 94, -1, -1, sizeof(::greptime::v1::region::DropRequest)},
+  { 101, 109, -1, sizeof(::greptime::v1::region::OpenRequest_OptionsEntry_DoNotUse)},
+  { 111, -1, -1, sizeof(::greptime::v1::region::OpenRequest)},
+  { 121, -1, -1, sizeof(::greptime::v1::region::CloseRequest)},
+  { 128, -1, -1, sizeof(::greptime::v1::region::AlterRequest)},
+  { 139, -1, -1, sizeof(::greptime::v1::region::AddColumns)},
+  { 146, -1, -1, sizeof(::greptime::v1::region::DropColumns)},
+  { 153, -1, -1, sizeof(::greptime::v1::region::AddColumn)},
+  { 161, -1, -1, sizeof(::greptime::v1::region::DropColumn)},
+  { 168, -1, -1, sizeof(::greptime::v1::region::FlushRequest)},
+  { 175, -1, -1, sizeof(::greptime::v1::region::CompactRequest)},
+  { 182, -1, -1, sizeof(::greptime::v1::region::RegionColumnDef)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -609,40 +607,40 @@ const char descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto[] P
   "(\0132\021.greptime.v1.Rows\"h\n\014QueryRequest\0227\n"
   "\006header\030\001 \001(\0132\'.greptime.v1.region.Regio"
   "nRequestHeader\022\021\n\tregion_id\030\002 \001(\004\022\014\n\004pla"
-  "n\030\003 \001(\014\"\236\002\n\rCreateRequest\022\021\n\tregion_id\030\001"
+  "n\030\003 \001(\014\"\200\002\n\rCreateRequest\022\021\n\tregion_id\030\001"
   " \001(\004\022\016\n\006engine\030\002 \001(\t\0228\n\013column_defs\030\003 \003("
   "\0132#.greptime.v1.region.RegionColumnDef\022\023"
-  "\n\013primary_key\030\004 \003(\r\022\034\n\024create_if_not_exi"
-  "sts\030\005 \001(\010\022\014\n\004path\030\006 \001(\t\022\?\n\007options\030\007 \003(\013"
-  "2..greptime.v1.region.CreateRequest.Opti"
-  "onsEntry\032.\n\014OptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n"
-  "\005value\030\002 \001(\t:\0028\001\" \n\013DropRequest\022\021\n\tregio"
-  "n_id\030\001 \001(\004\"\255\001\n\013OpenRequest\022\021\n\tregion_id\030"
-  "\001 \001(\004\022\016\n\006engine\030\002 \001(\t\022\014\n\004path\030\003 \001(\t\022=\n\007o"
-  "ptions\030\004 \003(\0132,.greptime.v1.region.OpenRe"
+  "\n\013primary_key\030\004 \003(\r\022\014\n\004path\030\005 \001(\t\022\?\n\007opt"
+  "ions\030\006 \003(\0132..greptime.v1.region.CreateRe"
   "quest.OptionsEntry\032.\n\014OptionsEntry\022\013\n\003ke"
-  "y\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"!\n\014CloseReque"
-  "st\022\021\n\tregion_id\030\001 \001(\004\"\261\001\n\014AlterRequest\022\021"
-  "\n\tregion_id\030\001 \001(\004\0225\n\013add_columns\030\002 \001(\0132\036"
-  ".greptime.v1.region.AddColumnsH\000\0227\n\014drop"
-  "_columns\030\003 \001(\0132\037.greptime.v1.region.Drop"
-  "ColumnsH\000\022\026\n\016schema_version\030\004 \001(\004B\006\n\004kin"
-  "d\"@\n\nAddColumns\0222\n\013add_columns\030\001 \003(\0132\035.g"
-  "reptime.v1.region.AddColumn\"C\n\013DropColum"
-  "ns\0224\n\014drop_columns\030\001 \003(\0132\036.greptime.v1.r"
-  "egion.DropColumn\"v\n\tAddColumn\0227\n\ncolumn_"
-  "def\030\001 \001(\0132#.greptime.v1.region.RegionCol"
-  "umnDef\0220\n\010location\030\003 \001(\0132\036.greptime.v1.A"
-  "ddColumnLocation\"\032\n\nDropColumn\022\014\n\004name\030\001"
-  " \001(\t\"!\n\014FlushRequest\022\021\n\tregion_id\030\001 \001(\004\""
-  "#\n\016CompactRequest\022\021\n\tregion_id\030\001 \001(\004\"P\n\017"
-  "RegionColumnDef\022*\n\ncolumn_def\030\001 \001(\0132\026.gr"
-  "eptime.v1.ColumnDef\022\021\n\tcolumn_id\030\002 \001(\r2Y"
-  "\n\006Region\022O\n\006Handle\022!.greptime.v1.region."
-  "RegionRequest\032\".greptime.v1.region.Regio"
-  "nResponseB]\n\025io.greptime.v1.regionB\006Serv"
-  "erZ<github.com/GreptimeTeam/greptime-pro"
-  "to/go/greptime/v1/regionb\006proto3"
+  "y\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\" \n\013DropReques"
+  "t\022\021\n\tregion_id\030\001 \001(\004\"\255\001\n\013OpenRequest\022\021\n\t"
+  "region_id\030\001 \001(\004\022\016\n\006engine\030\002 \001(\t\022\014\n\004path\030"
+  "\003 \001(\t\022=\n\007options\030\004 \003(\0132,.greptime.v1.reg"
+  "ion.OpenRequest.OptionsEntry\032.\n\014OptionsE"
+  "ntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"!\n\014"
+  "CloseRequest\022\021\n\tregion_id\030\001 \001(\004\"\261\001\n\014Alte"
+  "rRequest\022\021\n\tregion_id\030\001 \001(\004\0225\n\013add_colum"
+  "ns\030\002 \001(\0132\036.greptime.v1.region.AddColumns"
+  "H\000\0227\n\014drop_columns\030\003 \001(\0132\037.greptime.v1.r"
+  "egion.DropColumnsH\000\022\026\n\016schema_version\030\004 "
+  "\001(\004B\006\n\004kind\"@\n\nAddColumns\0222\n\013add_columns"
+  "\030\001 \003(\0132\035.greptime.v1.region.AddColumn\"C\n"
+  "\013DropColumns\0224\n\014drop_columns\030\001 \003(\0132\036.gre"
+  "ptime.v1.region.DropColumn\"v\n\tAddColumn\022"
+  "7\n\ncolumn_def\030\001 \001(\0132#.greptime.v1.region"
+  ".RegionColumnDef\0220\n\010location\030\003 \001(\0132\036.gre"
+  "ptime.v1.AddColumnLocation\"\032\n\nDropColumn"
+  "\022\014\n\004name\030\001 \001(\t\"!\n\014FlushRequest\022\021\n\tregion"
+  "_id\030\001 \001(\004\"#\n\016CompactRequest\022\021\n\tregion_id"
+  "\030\001 \001(\004\"P\n\017RegionColumnDef\022*\n\ncolumn_def\030"
+  "\001 \001(\0132\026.greptime.v1.ColumnDef\022\021\n\tcolumn_"
+  "id\030\002 \001(\r2Y\n\006Region\022O\n\006Handle\022!.greptime."
+  "v1.region.RegionRequest\032\".greptime.v1.re"
+  "gion.RegionResponseB]\n\025io.greptime.v1.re"
+  "gionB\006ServerZ<github.com/GreptimeTeam/gr"
+  "eptime-proto/go/greptime/v1/regionb\006prot"
+  "o3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_deps[3] = {
   &::descriptor_table_greptime_2fv1_2fcommon_2eproto,
@@ -651,7 +649,7 @@ static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2freg
 };
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto = {
-    false, false, 2552, descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto,
+    false, false, 2522, descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto,
     "greptime/v1/region/server.proto",
     &descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_once, descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_deps, 3, 22,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fregion_2fserver_2eproto::offsets,
@@ -3003,7 +3001,6 @@ CreateRequest::CreateRequest(const CreateRequest& from)
     , decltype(_impl_.engine_){}
     , decltype(_impl_.path_){}
     , decltype(_impl_.region_id_){}
-    , decltype(_impl_.create_if_not_exists_){}
     , /*decltype(_impl_._cached_size_)*/{}};
 
   _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
@@ -3024,9 +3021,7 @@ CreateRequest::CreateRequest(const CreateRequest& from)
     _this->_impl_.path_.Set(from._internal_path(), 
       _this->GetArenaForAllocation());
   }
-  ::memcpy(&_impl_.region_id_, &from._impl_.region_id_,
-    static_cast<size_t>(reinterpret_cast<char*>(&_impl_.create_if_not_exists_) -
-    reinterpret_cast<char*>(&_impl_.region_id_)) + sizeof(_impl_.create_if_not_exists_));
+  _this->_impl_.region_id_ = from._impl_.region_id_;
   // @@protoc_insertion_point(copy_constructor:greptime.v1.region.CreateRequest)
 }
 
@@ -3042,7 +3037,6 @@ inline void CreateRequest::SharedCtor(
     , decltype(_impl_.engine_){}
     , decltype(_impl_.path_){}
     , decltype(_impl_.region_id_){uint64_t{0u}}
-    , decltype(_impl_.create_if_not_exists_){false}
     , /*decltype(_impl_._cached_size_)*/{}
   };
   _impl_.engine_.InitDefault();
@@ -3094,9 +3088,7 @@ void CreateRequest::Clear() {
   _impl_.options_.Clear();
   _impl_.engine_.ClearToEmpty();
   _impl_.path_.ClearToEmpty();
-  ::memset(&_impl_.region_id_, 0, static_cast<size_t>(
-      reinterpret_cast<char*>(&_impl_.create_if_not_exists_) -
-      reinterpret_cast<char*>(&_impl_.region_id_)) + sizeof(_impl_.create_if_not_exists_));
+  _impl_.region_id_ = uint64_t{0u};
   _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
 }
 
@@ -3148,17 +3140,9 @@ const char* CreateRequest::_InternalParse(const char* ptr, ::_pbi::ParseContext*
         } else
           goto handle_unusual;
         continue;
-      // bool create_if_not_exists = 5;
+      // string path = 5;
       case 5:
-        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 40)) {
-          _impl_.create_if_not_exists_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint64(&ptr);
-          CHK_(ptr);
-        } else
-          goto handle_unusual;
-        continue;
-      // string path = 6;
-      case 6:
-        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 50)) {
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 42)) {
           auto str = _internal_mutable_path();
           ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);
           CHK_(ptr);
@@ -3166,16 +3150,16 @@ const char* CreateRequest::_InternalParse(const char* ptr, ::_pbi::ParseContext*
         } else
           goto handle_unusual;
         continue;
-      // map<string, string> options = 7;
-      case 7:
-        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 58)) {
+      // map<string, string> options = 6;
+      case 6:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 50)) {
           ptr -= 1;
           do {
             ptr += 1;
             ptr = ctx->ParseMessage(&_impl_.options_, ptr);
             CHK_(ptr);
             if (!ctx->DataAvailable(ptr)) break;
-          } while (::PROTOBUF_NAMESPACE_ID::internal::ExpectTag<58>(ptr));
+          } while (::PROTOBUF_NAMESPACE_ID::internal::ExpectTag<50>(ptr));
         } else
           goto handle_unusual;
         continue;
@@ -3241,23 +3225,17 @@ uint8_t* CreateRequest::_InternalSerialize(
     }
   }
 
-  // bool create_if_not_exists = 5;
-  if (this->_internal_create_if_not_exists() != 0) {
-    target = stream->EnsureSpace(target);
-    target = ::_pbi::WireFormatLite::WriteBoolToArray(5, this->_internal_create_if_not_exists(), target);
-  }
-
-  // string path = 6;
+  // string path = 5;
   if (!this->_internal_path().empty()) {
     ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::VerifyUtf8String(
       this->_internal_path().data(), static_cast<int>(this->_internal_path().length()),
       ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::SERIALIZE,
       "greptime.v1.region.CreateRequest.path");
     target = stream->WriteStringMaybeAliased(
-        6, this->_internal_path(), target);
+        5, this->_internal_path(), target);
   }
 
-  // map<string, string> options = 7;
+  // map<string, string> options = 6;
   if (!this->_internal_options().empty()) {
     using MapType = ::_pb::Map<std::string, std::string>;
     using WireHelper = CreateRequest_OptionsEntry_DoNotUse::Funcs;
@@ -3276,12 +3254,12 @@ uint8_t* CreateRequest::_InternalSerialize(
 
     if (stream->IsSerializationDeterministic() && map_field.size() > 1) {
       for (const auto& entry : ::_pbi::MapSorterPtr<MapType>(map_field)) {
-        target = WireHelper::InternalSerialize(7, entry.first, entry.second, target, stream);
+        target = WireHelper::InternalSerialize(6, entry.first, entry.second, target, stream);
         check_utf8(entry);
       }
     } else {
       for (const auto& entry : map_field) {
-        target = WireHelper::InternalSerialize(7, entry.first, entry.second, target, stream);
+        target = WireHelper::InternalSerialize(6, entry.first, entry.second, target, stream);
         check_utf8(entry);
       }
     }
@@ -3324,7 +3302,7 @@ size_t CreateRequest::ByteSizeLong() const {
     total_size += data_size;
   }
 
-  // map<string, string> options = 7;
+  // map<string, string> options = 6;
   total_size += 1 *
       ::PROTOBUF_NAMESPACE_ID::internal::FromIntSize(this->_internal_options_size());
   for (::PROTOBUF_NAMESPACE_ID::Map< std::string, std::string >::const_iterator
@@ -3340,7 +3318,7 @@ size_t CreateRequest::ByteSizeLong() const {
         this->_internal_engine());
   }
 
-  // string path = 6;
+  // string path = 5;
   if (!this->_internal_path().empty()) {
     total_size += 1 +
       ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
@@ -3352,11 +3330,6 @@ size_t CreateRequest::ByteSizeLong() const {
     total_size += ::_pbi::WireFormatLite::UInt64SizePlusOne(this->_internal_region_id());
   }
 
-  // bool create_if_not_exists = 5;
-  if (this->_internal_create_if_not_exists() != 0) {
-    total_size += 1 + 1;
-  }
-
   return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
 }
 
@@ -3387,9 +3360,6 @@ void CreateRequest::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::
   if (from._internal_region_id() != 0) {
     _this->_internal_set_region_id(from._internal_region_id());
   }
-  if (from._internal_create_if_not_exists() != 0) {
-    _this->_internal_set_create_if_not_exists(from._internal_create_if_not_exists());
-  }
   _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
 }
 
@@ -3420,12 +3390,7 @@ void CreateRequest::InternalSwap(CreateRequest* other) {
       &_impl_.path_, lhs_arena,
       &other->_impl_.path_, rhs_arena
   );
-  ::PROTOBUF_NAMESPACE_ID::internal::memswap<
-      PROTOBUF_FIELD_OFFSET(CreateRequest, _impl_.create_if_not_exists_)
-      + sizeof(CreateRequest::_impl_.create_if_not_exists_)
-      - PROTOBUF_FIELD_OFFSET(CreateRequest, _impl_.region_id_)>(
-          reinterpret_cast<char*>(&_impl_.region_id_),
-          reinterpret_cast<char*>(&other->_impl_.region_id_));
+  swap(_impl_.region_id_, other->_impl_.region_id_);
 }
 
 ::PROTOBUF_NAMESPACE_ID::Metadata CreateRequest::GetMetadata() const {
diff --git a/c++/greptime/v1/region/server.pb.h b/c++/greptime/v1/region/server.pb.h
index 394bc965..50dc9e13 100644
--- a/c++/greptime/v1/region/server.pb.h
+++ b/c++/greptime/v1/region/server.pb.h
@@ -1837,11 +1837,10 @@ class CreateRequest final :
   enum : int {
     kColumnDefsFieldNumber = 3,
     kPrimaryKeyFieldNumber = 4,
-    kOptionsFieldNumber = 7,
+    kOptionsFieldNumber = 6,
     kEngineFieldNumber = 2,
-    kPathFieldNumber = 6,
+    kPathFieldNumber = 5,
     kRegionIdFieldNumber = 1,
-    kCreateIfNotExistsFieldNumber = 5,
   };
   // repeated .greptime.v1.region.RegionColumnDef column_defs = 3;
   int column_defs_size() const;
@@ -1883,7 +1882,7 @@ class CreateRequest final :
   ::PROTOBUF_NAMESPACE_ID::RepeatedField< uint32_t >*
       mutable_primary_key();
 
-  // map<string, string> options = 7;
+  // map<string, string> options = 6;
   int options_size() const;
   private:
   int _internal_options_size() const;
@@ -1914,7 +1913,7 @@ class CreateRequest final :
   std::string* _internal_mutable_engine();
   public:
 
-  // string path = 6;
+  // string path = 5;
   void clear_path();
   const std::string& path() const;
   template <typename ArgT0 = const std::string&, typename... ArgT>
@@ -1937,15 +1936,6 @@ class CreateRequest final :
   void _internal_set_region_id(uint64_t value);
   public:
 
-  // bool create_if_not_exists = 5;
-  void clear_create_if_not_exists();
-  bool create_if_not_exists() const;
-  void set_create_if_not_exists(bool value);
-  private:
-  bool _internal_create_if_not_exists() const;
-  void _internal_set_create_if_not_exists(bool value);
-  public:
-
   // @@protoc_insertion_point(class_scope:greptime.v1.region.CreateRequest)
  private:
   class _Internal;
@@ -1965,7 +1955,6 @@ class CreateRequest final :
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr engine_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr path_;
     uint64_t region_id_;
-    bool create_if_not_exists_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
   };
   union { Impl_ _impl_; };
@@ -5389,27 +5378,7 @@ CreateRequest::mutable_primary_key() {
   return _internal_mutable_primary_key();
 }
 
-// bool create_if_not_exists = 5;
-inline void CreateRequest::clear_create_if_not_exists() {
-  _impl_.create_if_not_exists_ = false;
-}
-inline bool CreateRequest::_internal_create_if_not_exists() const {
-  return _impl_.create_if_not_exists_;
-}
-inline bool CreateRequest::create_if_not_exists() const {
-  // @@protoc_insertion_point(field_get:greptime.v1.region.CreateRequest.create_if_not_exists)
-  return _internal_create_if_not_exists();
-}
-inline void CreateRequest::_internal_set_create_if_not_exists(bool value) {
-  
-  _impl_.create_if_not_exists_ = value;
-}
-inline void CreateRequest::set_create_if_not_exists(bool value) {
-  _internal_set_create_if_not_exists(value);
-  // @@protoc_insertion_point(field_set:greptime.v1.region.CreateRequest.create_if_not_exists)
-}
-
-// string path = 6;
+// string path = 5;
 inline void CreateRequest::clear_path() {
   _impl_.path_.ClearToEmpty();
 }
@@ -5459,7 +5428,7 @@ inline void CreateRequest::set_allocated_path(std::string* path) {
   // @@protoc_insertion_point(field_set_allocated:greptime.v1.region.CreateRequest.path)
 }
 
-// map<string, string> options = 7;
+// map<string, string> options = 6;
 inline int CreateRequest::_internal_options_size() const {
   return _impl_.options_.size();
 }
diff --git a/java/src/main/java/io/greptime/v1/region/Server.java b/java/src/main/java/io/greptime/v1/region/Server.java
index 244fe142..ec66bea7 100644
--- a/java/src/main/java/io/greptime/v1/region/Server.java
+++ b/java/src/main/java/io/greptime/v1/region/Server.java
@@ -7943,22 +7943,12 @@ io.greptime.v1.region.Server.RegionColumnDefOrBuilder getColumnDefsOrBuilder(
      */
     int getPrimaryKey(int index);
 
-    /**
-     * <pre>
-     * Create region if not exists.
-     * </pre>
-     *
-     * <code>bool create_if_not_exists = 5;</code>
-     * @return The createIfNotExists.
-     */
-    boolean getCreateIfNotExists();
-
     /**
      * <pre>
      * Region storage path
      * </pre>
      *
-     * <code>string path = 6;</code>
+     * <code>string path = 5;</code>
      * @return The path.
      */
     java.lang.String getPath();
@@ -7967,7 +7957,7 @@ io.greptime.v1.region.Server.RegionColumnDefOrBuilder getColumnDefsOrBuilder(
      * Region storage path
      * </pre>
      *
-     * <code>string path = 6;</code>
+     * <code>string path = 5;</code>
      * @return The bytes for path.
      */
     com.google.protobuf.ByteString
@@ -7978,7 +7968,7 @@ io.greptime.v1.region.Server.RegionColumnDefOrBuilder getColumnDefsOrBuilder(
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
     int getOptionsCount();
     /**
@@ -7986,7 +7976,7 @@ io.greptime.v1.region.Server.RegionColumnDefOrBuilder getColumnDefsOrBuilder(
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
     boolean containsOptions(
         java.lang.String key);
@@ -8001,7 +7991,7 @@ boolean containsOptions(
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
     java.util.Map<java.lang.String, java.lang.String>
     getOptionsMap();
@@ -8010,7 +8000,7 @@ boolean containsOptions(
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
 
     /* nullable */
@@ -8023,7 +8013,7 @@ java.lang.String getOptionsOrDefault(
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
 
     java.lang.String getOptionsOrThrow(
@@ -8120,18 +8110,13 @@ private CreateRequest(
               input.popLimit(limit);
               break;
             }
-            case 40: {
-
-              createIfNotExists_ = input.readBool();
-              break;
-            }
-            case 50: {
+            case 42: {
               java.lang.String s = input.readStringRequireUtf8();
 
               path_ = s;
               break;
             }
-            case 58: {
+            case 50: {
               if (!((mutable_bitField0_ & 0x00000004) != 0)) {
                 options_ = com.google.protobuf.MapField.newMapField(
                     OptionsDefaultEntryHolder.defaultEntry);
@@ -8181,7 +8166,7 @@ private CreateRequest(
     protected com.google.protobuf.MapField internalGetMapField(
         int number) {
       switch (number) {
-        case 7:
+        case 6:
           return internalGetOptions();
         default:
           throw new RuntimeException(
@@ -8353,29 +8338,14 @@ public int getPrimaryKey(int index) {
     }
     private int primaryKeyMemoizedSerializedSize = -1;
 
-    public static final int CREATE_IF_NOT_EXISTS_FIELD_NUMBER = 5;
-    private boolean createIfNotExists_;
-    /**
-     * <pre>
-     * Create region if not exists.
-     * </pre>
-     *
-     * <code>bool create_if_not_exists = 5;</code>
-     * @return The createIfNotExists.
-     */
-    @java.lang.Override
-    public boolean getCreateIfNotExists() {
-      return createIfNotExists_;
-    }
-
-    public static final int PATH_FIELD_NUMBER = 6;
+    public static final int PATH_FIELD_NUMBER = 5;
     private volatile java.lang.Object path_;
     /**
      * <pre>
      * Region storage path
      * </pre>
      *
-     * <code>string path = 6;</code>
+     * <code>string path = 5;</code>
      * @return The path.
      */
     @java.lang.Override
@@ -8396,7 +8366,7 @@ public java.lang.String getPath() {
      * Region storage path
      * </pre>
      *
-     * <code>string path = 6;</code>
+     * <code>string path = 5;</code>
      * @return The bytes for path.
      */
     @java.lang.Override
@@ -8414,7 +8384,7 @@ public java.lang.String getPath() {
       }
     }
 
-    public static final int OPTIONS_FIELD_NUMBER = 7;
+    public static final int OPTIONS_FIELD_NUMBER = 6;
     private static final class OptionsDefaultEntryHolder {
       static final com.google.protobuf.MapEntry<
           java.lang.String, java.lang.String> defaultEntry =
@@ -8445,7 +8415,7 @@ public int getOptionsCount() {
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
 
     @java.lang.Override
@@ -8467,7 +8437,7 @@ public java.util.Map<java.lang.String, java.lang.String> getOptions() {
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
     @java.lang.Override
 
@@ -8479,7 +8449,7 @@ public java.util.Map<java.lang.String, java.lang.String> getOptionsMap() {
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
     @java.lang.Override
 
@@ -8496,7 +8466,7 @@ public java.lang.String getOptionsOrDefault(
      * Options of the created region.
      * </pre>
      *
-     * <code>map&lt;string, string&gt; options = 7;</code>
+     * <code>map&lt;string, string&gt; options = 6;</code>
      */
     @java.lang.Override
 
@@ -8542,18 +8512,15 @@ public void writeTo(com.google.protobuf.CodedOutputStream output)
       for (int i = 0; i < primaryKey_.size(); i++) {
         output.writeUInt32NoTag(primaryKey_.getInt(i));
       }
-      if (createIfNotExists_ != false) {
-        output.writeBool(5, createIfNotExists_);
-      }
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(path_)) {
-        com.google.protobuf.GeneratedMessageV3.writeString(output, 6, path_);
+        com.google.protobuf.GeneratedMessageV3.writeString(output, 5, path_);
       }
       com.google.protobuf.GeneratedMessageV3
         .serializeStringMapTo(
           output,
           internalGetOptions(),
           OptionsDefaultEntryHolder.defaultEntry,
-          7);
+          6);
       unknownFields.writeTo(output);
     }
 
@@ -8588,12 +8555,8 @@ public int getSerializedSize() {
         }
         primaryKeyMemoizedSerializedSize = dataSize;
       }
-      if (createIfNotExists_ != false) {
-        size += com.google.protobuf.CodedOutputStream
-          .computeBoolSize(5, createIfNotExists_);
-      }
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(path_)) {
-        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, path_);
+        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(5, path_);
       }
       for (java.util.Map.Entry<java.lang.String, java.lang.String> entry
            : internalGetOptions().getMap().entrySet()) {
@@ -8603,7 +8566,7 @@ public int getSerializedSize() {
             .setValue(entry.getValue())
             .build();
         size += com.google.protobuf.CodedOutputStream
-            .computeMessageSize(7, options__);
+            .computeMessageSize(6, options__);
       }
       size += unknownFields.getSerializedSize();
       memoizedSize = size;
@@ -8628,8 +8591,6 @@ public boolean equals(final java.lang.Object obj) {
           .equals(other.getColumnDefsList())) return false;
       if (!getPrimaryKeyList()
           .equals(other.getPrimaryKeyList())) return false;
-      if (getCreateIfNotExists()
-          != other.getCreateIfNotExists()) return false;
       if (!getPath()
           .equals(other.getPath())) return false;
       if (!internalGetOptions().equals(
@@ -8658,9 +8619,6 @@ public int hashCode() {
         hash = (37 * hash) + PRIMARY_KEY_FIELD_NUMBER;
         hash = (53 * hash) + getPrimaryKeyList().hashCode();
       }
-      hash = (37 * hash) + CREATE_IF_NOT_EXISTS_FIELD_NUMBER;
-      hash = (53 * hash) + com.google.protobuf.Internal.hashBoolean(
-          getCreateIfNotExists());
       hash = (37 * hash) + PATH_FIELD_NUMBER;
       hash = (53 * hash) + getPath().hashCode();
       if (!internalGetOptions().getMap().isEmpty()) {
@@ -8778,7 +8736,7 @@ public static final class Builder extends
       protected com.google.protobuf.MapField internalGetMapField(
           int number) {
         switch (number) {
-          case 7:
+          case 6:
             return internalGetOptions();
           default:
             throw new RuntimeException(
@@ -8789,7 +8747,7 @@ protected com.google.protobuf.MapField internalGetMapField(
       protected com.google.protobuf.MapField internalGetMutableMapField(
           int number) {
         switch (number) {
-          case 7:
+          case 6:
             return internalGetMutableOptions();
           default:
             throw new RuntimeException(
@@ -8835,8 +8793,6 @@ public Builder clear() {
         }
         primaryKey_ = emptyIntList();
         bitField0_ = (bitField0_ & ~0x00000002);
-        createIfNotExists_ = false;
-
         path_ = "";
 
         internalGetMutableOptions().clear();
@@ -8883,7 +8839,6 @@ public io.greptime.v1.region.Server.CreateRequest buildPartial() {
           bitField0_ = (bitField0_ & ~0x00000002);
         }
         result.primaryKey_ = primaryKey_;
-        result.createIfNotExists_ = createIfNotExists_;
         result.path_ = path_;
         result.options_ = internalGetOptions();
         result.options_.makeImmutable();
@@ -8978,9 +8933,6 @@ public Builder mergeFrom(io.greptime.v1.region.Server.CreateRequest other) {
           }
           onChanged();
         }
-        if (other.getCreateIfNotExists() != false) {
-          setCreateIfNotExists(other.getCreateIfNotExists());
-        }
         if (!other.getPath().isEmpty()) {
           path_ = other.path_;
           onChanged();
@@ -9563,56 +9515,13 @@ public Builder clearPrimaryKey() {
         return this;
       }
 
-      private boolean createIfNotExists_ ;
-      /**
-       * <pre>
-       * Create region if not exists.
-       * </pre>
-       *
-       * <code>bool create_if_not_exists = 5;</code>
-       * @return The createIfNotExists.
-       */
-      @java.lang.Override
-      public boolean getCreateIfNotExists() {
-        return createIfNotExists_;
-      }
-      /**
-       * <pre>
-       * Create region if not exists.
-       * </pre>
-       *
-       * <code>bool create_if_not_exists = 5;</code>
-       * @param value The createIfNotExists to set.
-       * @return This builder for chaining.
-       */
-      public Builder setCreateIfNotExists(boolean value) {
-        
-        createIfNotExists_ = value;
-        onChanged();
-        return this;
-      }
-      /**
-       * <pre>
-       * Create region if not exists.
-       * </pre>
-       *
-       * <code>bool create_if_not_exists = 5;</code>
-       * @return This builder for chaining.
-       */
-      public Builder clearCreateIfNotExists() {
-        
-        createIfNotExists_ = false;
-        onChanged();
-        return this;
-      }
-
       private java.lang.Object path_ = "";
       /**
        * <pre>
        * Region storage path
        * </pre>
        *
-       * <code>string path = 6;</code>
+       * <code>string path = 5;</code>
        * @return The path.
        */
       public java.lang.String getPath() {
@@ -9632,7 +9541,7 @@ public java.lang.String getPath() {
        * Region storage path
        * </pre>
        *
-       * <code>string path = 6;</code>
+       * <code>string path = 5;</code>
        * @return The bytes for path.
        */
       public com.google.protobuf.ByteString
@@ -9653,7 +9562,7 @@ public java.lang.String getPath() {
        * Region storage path
        * </pre>
        *
-       * <code>string path = 6;</code>
+       * <code>string path = 5;</code>
        * @param value The path to set.
        * @return This builder for chaining.
        */
@@ -9672,7 +9581,7 @@ public Builder setPath(
        * Region storage path
        * </pre>
        *
-       * <code>string path = 6;</code>
+       * <code>string path = 5;</code>
        * @return This builder for chaining.
        */
       public Builder clearPath() {
@@ -9686,7 +9595,7 @@ public Builder clearPath() {
        * Region storage path
        * </pre>
        *
-       * <code>string path = 6;</code>
+       * <code>string path = 5;</code>
        * @param value The bytes for path to set.
        * @return This builder for chaining.
        */
@@ -9733,7 +9642,7 @@ public int getOptionsCount() {
        * Options of the created region.
        * </pre>
        *
-       * <code>map&lt;string, string&gt; options = 7;</code>
+       * <code>map&lt;string, string&gt; options = 6;</code>
        */
 
       @java.lang.Override
@@ -9755,7 +9664,7 @@ public java.util.Map<java.lang.String, java.lang.String> getOptions() {
        * Options of the created region.
        * </pre>
        *
-       * <code>map&lt;string, string&gt; options = 7;</code>
+       * <code>map&lt;string, string&gt; options = 6;</code>
        */
       @java.lang.Override
 
@@ -9767,7 +9676,7 @@ public java.util.Map<java.lang.String, java.lang.String> getOptionsMap() {
        * Options of the created region.
        * </pre>
        *
-       * <code>map&lt;string, string&gt; options = 7;</code>
+       * <code>map&lt;string, string&gt; options = 6;</code>
        */
       @java.lang.Override
 
@@ -9784,7 +9693,7 @@ public java.lang.String getOptionsOrDefault(
        * Options of the created region.
        * </pre>
        *
-       * <code>map&lt;string, string&gt; options = 7;</code>
+       * <code>map&lt;string, string&gt; options = 6;</code>
        */
       @java.lang.Override
 
@@ -9809,7 +9718,7 @@ public Builder clearOptions() {
        * Options of the created region.
        * </pre>
        *
-       * <code>map&lt;string, string&gt; options = 7;</code>
+       * <code>map&lt;string, string&gt; options = 6;</code>
        */
 
       public Builder removeOptions(
@@ -9832,7 +9741,7 @@ public Builder removeOptions(
        * Options of the created region.
        * </pre>
        *
-       * <code>map&lt;string, string&gt; options = 7;</code>
+       * <code>map&lt;string, string&gt; options = 6;</code>
        */
       public Builder putOptions(
           java.lang.String key,
@@ -9851,7 +9760,7 @@ public Builder putOptions(
        * Options of the created region.
        * </pre>
        *
-       * <code>map&lt;string, string&gt; options = 7;</code>
+       * <code>map&lt;string, string&gt; options = 6;</code>
        */
 
       public Builder putAllOptions(
@@ -18084,40 +17993,40 @@ public io.greptime.v1.region.Server.RegionColumnDef getDefaultInstanceForType()
       "(\0132\021.greptime.v1.Rows\"h\n\014QueryRequest\0227\n" +
       "\006header\030\001 \001(\0132\'.greptime.v1.region.Regio" +
       "nRequestHeader\022\021\n\tregion_id\030\002 \001(\004\022\014\n\004pla" +
-      "n\030\003 \001(\014\"\236\002\n\rCreateRequest\022\021\n\tregion_id\030\001" +
+      "n\030\003 \001(\014\"\200\002\n\rCreateRequest\022\021\n\tregion_id\030\001" +
       " \001(\004\022\016\n\006engine\030\002 \001(\t\0228\n\013column_defs\030\003 \003(" +
       "\0132#.greptime.v1.region.RegionColumnDef\022\023" +
-      "\n\013primary_key\030\004 \003(\r\022\034\n\024create_if_not_exi" +
-      "sts\030\005 \001(\010\022\014\n\004path\030\006 \001(\t\022?\n\007options\030\007 \003(\013" +
-      "2..greptime.v1.region.CreateRequest.Opti" +
-      "onsEntry\032.\n\014OptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n" +
-      "\005value\030\002 \001(\t:\0028\001\" \n\013DropRequest\022\021\n\tregio" +
-      "n_id\030\001 \001(\004\"\255\001\n\013OpenRequest\022\021\n\tregion_id\030" +
-      "\001 \001(\004\022\016\n\006engine\030\002 \001(\t\022\014\n\004path\030\003 \001(\t\022=\n\007o" +
-      "ptions\030\004 \003(\0132,.greptime.v1.region.OpenRe" +
+      "\n\013primary_key\030\004 \003(\r\022\014\n\004path\030\005 \001(\t\022?\n\007opt" +
+      "ions\030\006 \003(\0132..greptime.v1.region.CreateRe" +
       "quest.OptionsEntry\032.\n\014OptionsEntry\022\013\n\003ke" +
-      "y\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"!\n\014CloseReque" +
-      "st\022\021\n\tregion_id\030\001 \001(\004\"\261\001\n\014AlterRequest\022\021" +
-      "\n\tregion_id\030\001 \001(\004\0225\n\013add_columns\030\002 \001(\0132\036" +
-      ".greptime.v1.region.AddColumnsH\000\0227\n\014drop" +
-      "_columns\030\003 \001(\0132\037.greptime.v1.region.Drop" +
-      "ColumnsH\000\022\026\n\016schema_version\030\004 \001(\004B\006\n\004kin" +
-      "d\"@\n\nAddColumns\0222\n\013add_columns\030\001 \003(\0132\035.g" +
-      "reptime.v1.region.AddColumn\"C\n\013DropColum" +
-      "ns\0224\n\014drop_columns\030\001 \003(\0132\036.greptime.v1.r" +
-      "egion.DropColumn\"v\n\tAddColumn\0227\n\ncolumn_" +
-      "def\030\001 \001(\0132#.greptime.v1.region.RegionCol" +
-      "umnDef\0220\n\010location\030\003 \001(\0132\036.greptime.v1.A" +
-      "ddColumnLocation\"\032\n\nDropColumn\022\014\n\004name\030\001" +
-      " \001(\t\"!\n\014FlushRequest\022\021\n\tregion_id\030\001 \001(\004\"" +
-      "#\n\016CompactRequest\022\021\n\tregion_id\030\001 \001(\004\"P\n\017" +
-      "RegionColumnDef\022*\n\ncolumn_def\030\001 \001(\0132\026.gr" +
-      "eptime.v1.ColumnDef\022\021\n\tcolumn_id\030\002 \001(\r2Y" +
-      "\n\006Region\022O\n\006Handle\022!.greptime.v1.region." +
-      "RegionRequest\032\".greptime.v1.region.Regio" +
-      "nResponseB]\n\025io.greptime.v1.regionB\006Serv" +
-      "erZ<github.com/GreptimeTeam/greptime-pro" +
-      "to/go/greptime/v1/regionb\006proto3"
+      "y\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\" \n\013DropReques" +
+      "t\022\021\n\tregion_id\030\001 \001(\004\"\255\001\n\013OpenRequest\022\021\n\t" +
+      "region_id\030\001 \001(\004\022\016\n\006engine\030\002 \001(\t\022\014\n\004path\030" +
+      "\003 \001(\t\022=\n\007options\030\004 \003(\0132,.greptime.v1.reg" +
+      "ion.OpenRequest.OptionsEntry\032.\n\014OptionsE" +
+      "ntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"!\n\014" +
+      "CloseRequest\022\021\n\tregion_id\030\001 \001(\004\"\261\001\n\014Alte" +
+      "rRequest\022\021\n\tregion_id\030\001 \001(\004\0225\n\013add_colum" +
+      "ns\030\002 \001(\0132\036.greptime.v1.region.AddColumns" +
+      "H\000\0227\n\014drop_columns\030\003 \001(\0132\037.greptime.v1.r" +
+      "egion.DropColumnsH\000\022\026\n\016schema_version\030\004 " +
+      "\001(\004B\006\n\004kind\"@\n\nAddColumns\0222\n\013add_columns" +
+      "\030\001 \003(\0132\035.greptime.v1.region.AddColumn\"C\n" +
+      "\013DropColumns\0224\n\014drop_columns\030\001 \003(\0132\036.gre" +
+      "ptime.v1.region.DropColumn\"v\n\tAddColumn\022" +
+      "7\n\ncolumn_def\030\001 \001(\0132#.greptime.v1.region" +
+      ".RegionColumnDef\0220\n\010location\030\003 \001(\0132\036.gre" +
+      "ptime.v1.AddColumnLocation\"\032\n\nDropColumn" +
+      "\022\014\n\004name\030\001 \001(\t\"!\n\014FlushRequest\022\021\n\tregion" +
+      "_id\030\001 \001(\004\"#\n\016CompactRequest\022\021\n\tregion_id" +
+      "\030\001 \001(\004\"P\n\017RegionColumnDef\022*\n\ncolumn_def\030" +
+      "\001 \001(\0132\026.greptime.v1.ColumnDef\022\021\n\tcolumn_" +
+      "id\030\002 \001(\r2Y\n\006Region\022O\n\006Handle\022!.greptime." +
+      "v1.region.RegionRequest\032\".greptime.v1.re" +
+      "gion.RegionResponseB]\n\025io.greptime.v1.re" +
+      "gionB\006ServerZ<github.com/GreptimeTeam/gr" +
+      "eptime-proto/go/greptime/v1/regionb\006prot" +
+      "o3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -18179,7 +18088,7 @@ public io.greptime.v1.region.Server.RegionColumnDef getDefaultInstanceForType()
     internal_static_greptime_v1_region_CreateRequest_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_region_CreateRequest_descriptor,
-        new java.lang.String[] { "RegionId", "Engine", "ColumnDefs", "PrimaryKey", "CreateIfNotExists", "Path", "Options", });
+        new java.lang.String[] { "RegionId", "Engine", "ColumnDefs", "PrimaryKey", "Path", "Options", });
     internal_static_greptime_v1_region_CreateRequest_OptionsEntry_descriptor =
       internal_static_greptime_v1_region_CreateRequest_descriptor.getNestedTypes().get(0);
     internal_static_greptime_v1_region_CreateRequest_OptionsEntry_fieldAccessorTable = new
diff --git a/proto/greptime/v1/region/server.proto b/proto/greptime/v1/region/server.proto
index 326d42a1..ca8893aa 100644
--- a/proto/greptime/v1/region/server.proto
+++ b/proto/greptime/v1/region/server.proto
@@ -83,12 +83,10 @@ message CreateRequest {
   repeated RegionColumnDef column_defs = 3;
   // Column Id of primary keys.
   repeated uint32 primary_key = 4;
-  // Create region if not exists.
-  bool create_if_not_exists = 5;
   // Region storage path
-  string path = 6;
+  string path = 5;
   // Options of the created region.
-  map<string, string> options = 7;
+  map<string, string> options = 6;
   // TODO: add partition def
 }