Which scenario is causing the alert and need to be addressed to allow the entities...

The scenario that is causing the alert and needs to be addressed to allow the entities to be protected is that one or more VMs or Volume Groups belonging to the Consistency Group may have been deleted. A Consistency Group is a logical grouping of VMs or Volume Groups that are protected together by a Protection Policy. A Protection Policy is a set of rules that defines how often snapshots are taken, how long they are retained, and where they are replicated for disaster recovery purposes. If one or more VMs or Volume Groups belonging to the Consistency Group are deleted, the Protection Policy will fail to protect them and generate an alert with the code AI303551 – VolumeGroupProtectionFailed. References: Nutanix Volumes Administration Guide, page 29; Nutanix Volumes Troubleshooting Guide