diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
index 3ac81ab..28f5884 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
@@ -1277,9 +1277,13 @@ protected function updateDedicatedTableSchema(FieldStorageDefinitionInterface $s
       $table = $table_mapping->getDedicatedDataTableName($original);
       $revision_table = $table_mapping->getDedicatedRevisionTableName($original);
 
+      // Get the field schemas.
       $schema = $storage_definition->getSchema();
       $original_schema = $original->getSchema();
 
+      // Gets the SQL schema for a dedicated tables.
+      $actual_schema = $this->getDedicatedTableSchema($storage_definition);
+
       foreach ($original_schema['indexes'] as $name => $columns) {
         if (!isset($schema['indexes'][$name]) || $columns != $schema['indexes'][$name]) {
           $real_name = $this->getFieldIndexName($storage_definition, $name);
@@ -1306,8 +1310,8 @@ protected function updateDedicatedTableSchema(FieldStorageDefinitionInterface $s
               $real_columns[] = $table_mapping->getFieldColumnName($storage_definition, $column_name);
             }
           }
-          $this->database->schema()->addIndex($table, $real_name, $real_columns, $schema);
-          $this->database->schema()->addIndex($revision_table, $real_name, $real_columns, $schema);
+          $this->database->schema()->addIndex($table, $real_name, $real_columns, $actual_schema[$table]);
+          $this->database->schema()->addIndex($revision_table, $real_name, $real_columns, $actual_schema[$revision_table]);
         }
       }
       $this->saveFieldSchemaData($storage_definition, $this->getDedicatedTableSchema($storage_definition));