How to fix the Oracle error ORA-16012: database identifier mismatch?

In this post, you’ll learn more about the Oracle ErrorORA-16012: database identifier mismatch with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-16012: database identifier mismatch

Reason for the Error ORA-16012: database identifier mismatch

The database identifier of a physical standby database did not match that of the primary database.

How to fix the Error ORA-16012: database identifier mismatch ?

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

Ensure that the database identifier of each physical standby database matches that of the primary database.