How to fix the Oracle error RMAN-05021: this configuration cannot be changed for a BACKUP or STANDBY control file?

In this post, you’ll learn more about the Oracle ErrorRMAN-05021: this configuration cannot be changed for a BACKUP or STANDBY control file with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

RMAN-05021: this configuration cannot be changed for a BACKUP or STANDBY control file

Reason for the Error RMAN-05021: this configuration cannot be changed for a BACKUP or STANDBY control file

The user attempted to modify the configuration which cannot be changed for a BACKUP or STANDBY control file while the mounted control file was either BACKUP or STANDBY. The following configurations can be changed only when connected to primary database instance that has CURRENT/CREATED control file type mounted: CONFIGURE RETENTION POLICY CONFIGURE EXCLUDE CONFIGURE ENCRYPTION CONFIGURE DB_UNIQUE_NAME

How to fix the Error RMAN-05021: this configuration cannot be changed for a BACKUP or STANDBY control file ?

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

Connect to primary database instance and execute the command.