How to fix the Oracle error ORA-19974: database name has changed?

In this post, you’ll learn more about the Oracle ErrorORA-19974: database name has changed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-19974: database name has changed

Reason for the Error ORA-19974: database name has changed

Physical standby role transition required only one instance left running if database name was changed and flashback database logging was enabled.

How to fix the Error ORA-19974: database name has changed ?

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

Shutdown all but one instance, then retry the command.