ORA-30502: system triggers cannot have

admin

ORA-30502: system triggers cannot have INSERT, UPDATE, or DELETE as
triggering events
Cause: An attempt was madeto create a system trigger with INSERT, UPDATE,
or DELETE triggering events, but this type of trigger is not supported becausea
system trigger does not have a base table.
Action: Do not attempt tocreate a system trigger with INSERT, UPDATE, or
DELETE triggering events.
18-69