Błąd: ERROR:  deadlock detected
DETAIL:  Process 984051 waits for ShareLock on transaction 16862906; blocked by process 984020.
Process 984020 waits for ShareLock on transaction 16862933; blocked by process 984051.
HINT:  See server log for query details.
CONTEXT:  while locking tuple (2,12) in relation "adv"