AS
BEGIN
-- "стираем" ранее введенный аналогичный документ
  IF EXISTS(
      SELECT I.ID
      FROM TBL_IDENTIFICATION I
      WHERE ((I.FK_PEOPLE = NEW.FK_PEOPLE)
              AND (I.DOC_TYPE  = NEW.DOC_TYPE)
              AND (I.RDB$DB_KEY <> NEW.RDB$DB_KEY))
            )
  THEN
    BEGIN
      UPDATE TBL_IDENTIFICATION I
      SET I.DELETED_REC = 1
      WHERE ((I.FK_PEOPLE = NEW.FK_PEOPLE)
              AND (I.DOC_TYPE  = NEW.DOC_TYPE)
              AND (I.RDB$DB_KEY <> NEW.RDB$DB_KEY));
    END
END