How to fix the Oracle error ORA-16642: DB_UNIQUE_NAME mismatch?

In this post, you’ll learn more about the Oracle ErrorORA-16642: DB_UNIQUE_NAME mismatch with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-16642: DB_UNIQUE_NAME mismatch

Reason for the Error ORA-16642: DB_UNIQUE_NAME mismatch

The expected DB_UNIQUE_NAME value did not match the actual DB_UNIQUE_NAME value for the database that the broker contacted using the connect identifier that was associated with that database.

How to fix the Error ORA-16642: DB_UNIQUE_NAME mismatch ?

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

Verify that the connect identifier correctly connects to the intended database. Verify that the name of the database the broker expects to find by that connect identifier matches the actual DB_UNIQUE_NAME for that database.