How to fix the Oracle error NID-00124: Mismatched dbid for datafile string, expected number, found number?

In this post, you’ll learn more about the Oracle ErrorNID-00124: Mismatched dbid for datafile string, expected number, found number with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NID-00124: Mismatched dbid for datafile string, expected number, found number

Reason for the Error NID-00124: Mismatched dbid for datafile string, expected number, found number

The dbid of the datafile does not match the ‘old’ DBID or the ‘new’ DBID.

How to fix the Error NID-00124: Mismatched dbid for datafile string, expected number, found number ?

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

Verify that this datafile belongs to the database. You may need to restore a backup of the datafile.