ошибка в триггере

CREATE OR REPLACE TRIGGER setidpriznaki1
   AFTER INSERT OR UPDATE OF numpirgal
   ON pir2pir
   FOR EACH ROW
   WHEN (TRIM (NEW.numpirgal) IS NOT NULL)
DECLARE
   PRAGMA AUTONOMOUS_TRANSACTION;
   fnumpirgal    pir2pir.numpirgal%TYPE;
   fidpriznaki   priznaki.ID%TYPE;
BEGIN
   SELECT TRIM (VALUE)
     INTO fidpriznaki
     FROM installations
    WHERE UPPER (parameter) = UPPER ('UpdateProblemIdPriznaki1');

   IF fidpriznaki IS NOT NULL
   THEN
      IF :NEW.idparent = 0
      THEN
         :NEW.id_priznaki1 := fidpriznaki;
      ELSE
         UPDATE pir2pir
            SET id_priznaki1 = fidpriznaki
          WHERE ID = :NEW.idparent;
      END IF;
   END IF;

   COMMIT;
END;
/

...
         :NEW.id_priznaki1 := fidpriznaki;
...

fidpriznaki := fidpriznaki;