diff --git a/UPDATING.md b/UPDATING.md
index 34537a5a2d..ef9405e1fc 100644
--- a/UPDATING.md
+++ b/UPDATING.md
@@ -23,6 +23,8 @@ assists people when migrating to a new version.
 
 ## Next
 
+* [8867](https://github.com/apache/incubator-superset/pull/8867): a change which adds the `tmp_schema_name` column to the `query` table which requires locking the table. Given the `query` table is heavily used performance may be degraded during the migration. Scheduled downtime may be advised.
+
 * [9238](https://github.com/apache/incubator-superset/pull/9238): the config option `TIME_GRAIN_FUNCTIONS` has been renamed to `TIME_GRAIN_EXPRESSIONS` to better reflect the content of the dictionary.
 
 * [9218](https://github.com/apache/incubator-superset/pull/9218): SQLite connections have been disabled by default