How to fix the Oracle error ORA-19975: database must not be started in any other instance?

In this post, you’ll learn more about the Oracle ErrorORA-19975: database must not be started in any other instance with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-19975: database must not be started in any other instance

Reason for the Error ORA-19975: database must not be started in any other instance

The physical standby role transition command failed because a certain condition required the database to be mounted in this instance and not started in any other instance.

How to fix the Error ORA-19975: database must not be started in any other instance ?

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

See associated error message for detailed explanation.