DB2 Trigger Error : An unexpected token "OR INSERT" was found following SQLCODE=-104, SQLSTATE=42601, DRIVER=3.68.61

I am getting an error while executing the following queries. As per the DB2 documentation, we can have both update and insert event in the same trigger, but when I am trying to do so I am getting an error.

CREATE TABLE NULL_LOOKUP ( ID INT NOT NULL, TABLE_NAME VARCHAR(100) NOT NULL ); CREATE TABLE PARENT ( PARENT_ID INT NOT NULL, PARENT_NAME VARCHAR(100) NOT NULL ); CREATE TABLE CHILD_ONE ( CHILD_ONE_ID INT NOT NULL, CHILD_NAME VARCHAR(100) NOT NULL, PARENT_ID INT ); --#SET TERMINATOR @ CREATE OR REPLACE TRIGGER RESET_NULL_TRIGGER BEFORE UPDATE OF PARENT_ID OR INSERT ON CHILD_ONE REFERENCING NEW AS N FOR EACH ROW WHEN (N.PARENT_ID IS NULL) BEGIN ATOMIC SET N.PARENT_ID = (SELECT ID FROM NULL_LOOKUP WHERE TABLE_NAME = 'PARENT'); END @ --#SET TERMINATOR ;