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-rw-r--r--synapse/storage/databases/main/purge_events.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/storage/databases/main/purge_events.py b/synapse/storage/databases/main/purge_events.py
index 5d668aadb2..ecfc9f20b1 100644
--- a/synapse/storage/databases/main/purge_events.py
+++ b/synapse/storage/databases/main/purge_events.py
@@ -172,7 +172,7 @@ class PurgeEventsStore(StateGroupWorkerStore, SQLBaseStore):
         )
 
         # Update backward extremeties
-        txn.executemany(
+        txn.execute_batch(
             "INSERT INTO event_backward_extremities (room_id, event_id)"
             " VALUES (?, ?)",
             [(room_id, event_id) for event_id, in new_backwards_extrems],