The earliest recollection of this bug is traced back to PAN-OS 9.1.8 - July 29, 2024.
This bug is fixed in PAN-OS versions 9.1.8.
( PA-7000 Series firewalls with Log Forwarding Cards (LFCs) only ) Fixed an issue where GlobalProtect logs showed the incorrect client version and did not show event ID information.
For more information:
https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-8-addressed-issues