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-rw-r--r--synapse/storage/data_stores/main/schema/delta/56/stats_separated.sql6
1 files changed, 5 insertions, 1 deletions
diff --git a/synapse/storage/data_stores/main/schema/delta/56/stats_separated.sql b/synapse/storage/data_stores/main/schema/delta/56/stats_separated.sql
index 163529c071..bbdde121e8 100644
--- a/synapse/storage/data_stores/main/schema/delta/56/stats_separated.sql
+++ b/synapse/storage/data_stores/main/schema/delta/56/stats_separated.sql
@@ -35,9 +35,13 @@ DELETE FROM background_updates WHERE update_name IN (
     'populate_stats_cleanup'
 );
 
+-- this relies on current_state_events.membership having been populated, so add
+-- a dependency on current_state_events_membership.
 INSERT INTO background_updates (update_name, progress_json, depends_on) VALUES
-    ('populate_stats_process_rooms', '{}', '');
+    ('populate_stats_process_rooms', '{}', 'current_state_events_membership');
 
+-- this also relies on current_state_events.membership having been populated, but
+-- we get that as a side-effect of depending on populate_stats_process_rooms.
 INSERT INTO background_updates (update_name, progress_json, depends_on) VALUES
     ('populate_stats_process_users', '{}', 'populate_stats_process_rooms');