How to fix the Oracle error ORA-01177: data file does not match dictionary – probably old incarnation?

In this post, you’ll learn more about the Oracle ErrorORA-01177: data file does not match dictionary – probably old incarnation with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01177: data file does not match dictionary – probably old incarnation

Reason for the Error ORA-01177: data file does not match dictionary – probably old incarnation

When comparing the control file with the data dictionary after a CREATE CONTROLFILE or OPEN RESETLOGS, it was noted that this datafile was inconsistent with the dictionary. Most likely the file is a backup of a file that was dropped from the database, and the same file number was reused for a new file. It may also be that an incomplete recovery stopped at a time when this file number was used for another datafile.

How to fix the Error ORA-01177: data file does not match dictionary – probably old incarnation ?

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

Do a CREATE CONTROLFILE with the correct file or none at all.