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.