diff -u b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
--- b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
@@ -2456,12 +2456,12 @@
           $definition_spec = array_intersect_key($definition_schema[$table]['fields'][$name], $keys);
           $stored_spec = array_intersect_key($spec, $keys);
 
-          // Prior to Drupal 8.8.0, the last installed schema for the 'id' and
+          // Prior to Drupal 8.9.0, the last installed schema for the 'id' and
           // 'revision' fields of all content entity types was storing an
           // 'int' type instead of 'serial', so we need to explicitly allow
           // this conversion and not consider it as a change here.
           // @todo Remove this in 9.0.x.
-          // @see system_update_8806()
+          // @see system_update_8901()
           // @see https://www.drupal.org/project/drupal/issues/2928906
           if ($definition_spec['type'] === 'serial' && $stored_spec['type'] === 'int') {
             $stored_spec['type'] = 'serial';
diff -u b/core/modules/system/system.install b/core/modules/system/system.install
--- b/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -2525,7 +2525,7 @@
 /**
  * Update the stored schema data of ID fields.
  */
-function system_update_8806() {
+function system_update_8901() {
   $definition_update_manager = \Drupal::entityDefinitionUpdateManager();
   $entity_type_manager = \Drupal::entityTypeManager();
 
diff -u b/core/modules/system/tests/src/Functional/Update/EntityUpdateTest.php b/core/modules/system/tests/src/Functional/Update/EntityUpdateTest.php
--- b/core/modules/system/tests/src/Functional/Update/EntityUpdateTest.php
+++ b/core/modules/system/tests/src/Functional/Update/EntityUpdateTest.php
@@ -24,9 +24,9 @@
   }
 
   /**
-   * Tests system_update_8806().
+   * Tests system_update_8901().
    */
-  public function testSystemUpdate8806() {
+  public function testSystemUpdate8901() {
     // The installed field storage schema is wrong before running the update.
     $key_value_store = \Drupal::keyValue('entity.storage_schema.sql');
     $id_schema = $key_value_store->get('node.field_schema_data.nid', []);