How to fix the Oracle error ORA-01571: redo version string incompatible with ORACLE version string?

In this post, you’ll learn more about the Oracle ErrorORA-01571: redo version string incompatible with ORACLE version string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01571: redo version string incompatible with ORACLE version string

Reason for the Error ORA-01571: redo version string incompatible with ORACLE version string

This software version can not read the current redo logs, and either crash recovery is required or there are offline database files that need media recovery. If a file name is listed then it needs media recovery.

How to fix the Error ORA-01571: redo version string incompatible with ORACLE version string ?

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

Shutdown and startup using the compatible software. Do any required media recovery, and open the database. Shutdown and then startup using current software. If the file is going to be dropped then take it offline with the DROP option to skip this check.