Acronis Backup: Alert "Backup is missing: No successful backups for XX days" is raised when plan is revoked from all devices

Symptoms

You Acronis data center is updated to Acronis Cyber Cloud 8.0.

You receive a "Backup is missing: No successful backups have been performed by the backup plan more than for XX days" alert from a backup plan that is not applied to any device (was revoked from ALL resources but not deleted). 

Cause

Issue in the product.

Solution

Acronis development team is working on the issue.