Oracle Solution for Error ora-30502

ORA-30502: system triggers cannot have INSERT, UPDATE, or DELETE as triggering events

What triggered the Error:

An attempt was made to create a system trigger with INSERT, UPDATE, or DELETE triggering events, but this type of trigger is not supported because a system trigger does not have a base table.

What should we do to fix it:

Do not attempt to create a system trigger with INSERT, UPDATE, or DELETE triggering events.