RDS Continuous Backup Plan Completed with Warning

Hello,

The error you are witnessing is expected. This is because at any given point in time, only one continuous recovery can be present for resource. Hence, when you create a new plan with new vault for creating any subsequent continuous backups for your RDS instance and AWS Backup finds an existing continuous recovery point in a different backup vault, it throws the error.

So, as to successfully migrate the recovery point to a new vault with help of backup plan. Apart from modifying the plan, you will also need to dissociate or delete the continuous recovery point present in your previous vault. Detailed steps on the same can be found under the heading "Managing continuous backup settings" in below document.

[+] Managing continuous backup settings : https://docs.aws.amazon.com/aws-backup/latest/devguide/point-in-time-recovery.html#point-in-time-considerations

[+] CLI reference : https://awscli.amazonaws.com/v2/documentation/api/latest/reference/backup/disassociate-recovery-point.html

Thus, you do not need to delete the entire vault but just the previous continuous recovery point. Once the concerned recovery point has been successfully deleted/dissociated from the previous backup vault, you should not witness this error.