Fix inaccurate time series update / delete limitations

source/core/timeseries/timeseries-limitations.txt

@@ -26,18 +26,30 @@ The maximum size of a measurement document is 4 MB.
 Updates and Deletes
 ~~~~~~~~~~~~~~~~~~~
 
-:ref:`Time series collections <manual-timeseries-collection>` support update
-and delete operations with limitations. The following operations are not supported
-on time series collections:
-
-- :dbcommand:`findAndModify`.
-- Updates that modify the ``timeField``.
-- Updates with ``multi:false`` that modify the ``metaField``.
-- Updates with ``upsert:true``.
-- Updates or deletes in multi-document transactions.
-
-MongoDB supports all other update and delete operations. For more information, 
-see :ref:`<collection-method>`.
+Starting in MongoDB 5.1, you can perform some delete and update
+operations.
+
+Delete commands must meet the following requirements:
+
+- The query may only match on ``metaField`` field values.
+- The delete command may not limit the number of documents to be
+  deleted. You must use a delete command with ``justOne: false`` or the
+  :method:`~db.collection.deleteMany()` method.
+
+Update commands must meet the following requirements:
+
+- The query may only match on ``metaField`` field values.
+- The update command may only modify the ``metaField`` field value.
+- The update must be performed with an update document that contains
+  only :ref:`update operator <update-operators>` expressions.
+- The update command may not limit the number of documents to be
+  updated. You must use an update command with ``multi: true`` or the
+  :method:`~db.collection.updateMany()` method.
+- The update command may not set :ref:`upsert: true <update-upsert>`.
+
+In MongoDB 5.0, :ref:`Time series collections
+<manual-timeseries-collection>` only support insert operations and read
+queries. Updates and manual delete operations result in an error.
 
 To automatically delete old data, :ref:`set up automatic removal (TTL)
 <set-up-automatic-removal>`.