The earliest recollection of this bug is traced back to PAN-OS 8.1.5 - January 09, 2024. This bug is fixed in PAN-OS versions 8.1.5. Fixed an intermittent issue on Panorama M-Series and virtual appliances where an address object referenced in the address group was allowed to be deleted without a reference error which caused commits to fail. For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-5-addressed-issues