#12205: Stock inventory reindex bug.

Author: p-bystritsky

app/code/Magento/CatalogInventory/Model/ResourceModel/Indexer/Stock/DefaultStock.php

@@ -288,6 +288,7 @@ protected function _prepareIndexTable($entityIds = null)
      */
     protected function _updateIndex($entityIds)
     {
+        $this->deleteOldRecords($entityIds);
         $connection = $this->getConnection();
         $select = $this->_getStockStatusSelect($entityIds, true);
         $select = $this->getQueryProcessorComposite()->processQuery($select, $entityIds, true);
@@ -310,7 +311,6 @@ protected function _updateIndex($entityIds)
             }
         }
 
-        $this->deleteOldRecords($entityIds);
         $this->_updateIndexTable($data);
 
         return $this;