From 900f7f915ebb946f51077f38ab67506175cb7705 Mon Sep 17 00:00:00 2001
From: John Bodley <4567245+john-bodley@users.noreply.github.com>
Date: Wed, 16 Nov 2022 08:08:10 -0800
Subject: [PATCH] docs: Add potential downtime line item to UPDATING.md
 (#22130)

---
 UPDATING.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/UPDATING.md b/UPDATING.md
index 65b15f622b813..6ab1276147e38 100644
--- a/UPDATING.md
+++ b/UPDATING.md
@@ -39,6 +39,8 @@ assists people when migrating to a new version.
 
 ### Potential Downtime
 
+- [21284](https://github.com/apache/superset/pull/21284): A change which drops the unused `dbs.allow_multi_schema_metadata_fetch` column via a (potentially locking) DDL operation.
+
 ### Other
 
 ## 2.0.0