When trying to delete EFS backups via CPM for an AWS backup vault that was already manually deleted in AWS, it may fails with AccessDeniedException in UI and following in the agent logs:
Error,Failed to delete EFS backup (recovery point ARN: arn:aws:backup:eu-central-1:12345678:recovery-point:123-456-883a-789, region: eu-central-1, policy: policy_name). Exception: Insufficient privileges to perform this action. (AccessDeniedException)