The earliest recollection of this bug is traced back to PAN-OS 8.1.2 - January 09, 2024.
This bug is fixed in PAN-OS versions 8.1.2.
( VM-50 Lite firewalls only ) Fixed an intermittent issue where Failed to back up PAN-DB errors were reported in the system log due to management plane out-of-memory errors when a process ( devsrvr ) attempted to run an md5 checksum.
For more information:
https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-2-addressed-issues