1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/storage/schema/__init__.py b/synapse/storage/schema/__init__.py

index f87b1a4a0a..2160edb014 100644
--- a/synapse/storage/schema/__init__.py
+++ b/synapse/storage/schema/__init__.py
@@ -161,6 +161,7 @@ Changes in SCHEMA_VERSION = 89
 
 Changes in SCHEMA_VERSION = 90
     - Add a column `participant` to `room_memberships` table
+    - Add background update to delete unreferenced state groups.
 """