Ignore primary key conflicts in 'room_members'

internal/matrix/store.go

@@ -35,7 +35,7 @@ func (s sqlStore) CreateTables() error {
 			room_id	TEXT,
 			user_id	TEXT,
 
-			PRIMARY KEY (room_id, user_id)
+			PRIMARY KEY (room_id, user_id) ON CONFLICT IGNORE
 		);
 		`,
 	}