--todo 26032.20

ALTER TABLE WEBPORTALEVENT MODIFY (WEBUSER_ID NULL);

ALTER TABLE WEBPORTALEVENT
  DROP CONSTRAINT WEBPORTALEVENT_WEBUSER;
ALTER TABLE WEBPORTALEVENT
  ADD CONSTRAINT WEBPORTALEVENT_WEBUSER FOREIGN KEY (WEBUSER_ID)
  REFERENCES WEBUSER (WEBUSER_ID) ON DELETE SET NULL;