The earliest recollection of this bug is traced back to PAN-OS 8.1.13 - January 09, 2024.
This bug is fixed in PAN-OS versions 8.1.13, 9.1.1.
A fix was made to address an improper authorization vulnerability in PAN-OS ( CVE-2020-1998 ).
For more information:
https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-13-addressed-issues
https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-1-addressed-issues