1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/storage/prepare_database.py b/synapse/storage/prepare_database.py
index 1712932f31..640f242584 100644
--- a/synapse/storage/prepare_database.py
+++ b/synapse/storage/prepare_database.py
@@ -29,6 +29,8 @@ logger = logging.getLogger(__name__)
 
 # Remember to update this number every time a change is made to database
 # schema files, so the users will be informed on server restarts.
+# XXX: If you're about to bump this to 59 (or higher) please create an update
+# that drops the unused `cache_invalidation_stream` table, as per #7436!
 SCHEMA_VERSION = 58
 
 dir_path = os.path.abspath(os.path.dirname(__file__))