How to fix the Oracle error ORA-01612: instance string (thread string) is already enabled?

In this post, you’ll learn more about the Oracle ErrorORA-01612: instance string (thread string) is already enabled with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01612: instance string (thread string) is already enabled

Reason for the Error ORA-01612: instance string (thread string) is already enabled

An attempt was made to enable a thread that is already enabled.

How to fix the Error ORA-01612: instance string (thread string) is already enabled ?

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

Either use this thread or enable another thread.