The earliest recollection of this bug is traced back to PAN-OS 8.1.2 - July 22, 2025. This bug is fixed in PAN-OS versions 8.1.2. Fixed an issue on the Panorama™ management server where partial revert operations failed with the following error after you used the PAN-OS® XML API to create template stacks: template-stack-> is missing 'settings' template-stack is invalid . 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