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Remove from the event_relations table when purging historical events. #7978

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Jul 29, 2020
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1 change: 1 addition & 0 deletions changelog.d/7978.bugfix
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix a long standing bug: 'Duplicate key value violates unique constraint "event_relations_id"' when message retention is configured.
2 changes: 2 additions & 0 deletions synapse/storage/data_stores/main/purge_events.py
Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,7 @@ def _purge_history_txn(self, txn, room_id, token_str, delete_local_events):
# event_json
# event_push_actions
# event_reference_hashes
# event_relations
# event_search
# event_to_state_groups
# events
Expand Down Expand Up @@ -209,6 +210,7 @@ def _purge_history_txn(self, txn, room_id, token_str, delete_local_events):
"event_edges",
"event_forward_extremities",
"event_reference_hashes",
"event_relations",
"event_search",
"rejections",
):
Expand Down