How to fix the Oracle error ORA-13658: The specified directive already has an instance?

In this post, you’ll learn more about the Oracle ErrorORA-13658: The specified directive already has an instance with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-13658: The specified directive already has an instance

Reason for the Error ORA-13658: The specified directive already has an instance

An attempt was made to create multiple instances of a directive when not permitted

How to fix the Error ORA-13658: The specified directive already has an instance ?

You can fix this error in Oracle by following the below steps

Verify the parent directive identifier and the instance name.