The earliest recollection of this bug is traced back to PAN-OS 9.1.3 - July 29, 2024. This bug is fixed in PAN-OS versions 9.1.3. Fixed an issue where TMP files were not deleted, which caused the root partition to run out of disk space and caused issues with accessing the firewall. For more information: https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-3-addressed-issues