RMAN-08437
WARNING: Setting decryption on during backup backupset will change the encryption method of the output backup.
Cause
Set decryption command was executed followed by backup backupset command. This will change the encryption properties of the backup according to the current encryption and decryption settings in the RMAN session.
Action
Ensure that the encryption mode desired for the backup is reflected in the RMAN encryption and decryption settings. Dual mode encryption requires both encryption and decryption settings. If a backup is encrypted with dual mode and only one of the encryption modes is provided during backup backupset, the output backup will only be encrypted in the mode provided.