Disclaimer

Known affected versions were inferred from fixed-version data and were not explicitly confirmed by the vendor: 10.1.8-h8, 10.2.3-h14

The earliest recollection of this bug is traced back to PAN-OS 10.1.9 - May 06, 2026. This bug is fixed in PAN-OS versions 10.2.4, 10.1.9. Fixed an issue where, when a Panorama appliance on a PAN-OS 9.0 or later release pushed built-in external dynamic lists to a firewall on a PAN-OS 8.1 release, the external dynamic list was removed, but the rule was still pushed to the firewall. With this fix, Panorama will show a validation error when attempting to push a pre-defined external dynamic list to a firewall on a PAN-OS 8.1 release. For more information: https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-release-notes/pan-os-10-1-9-known-and-addressed-issues/pan-os-10-1-9-addressed-issues https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-release-notes/pan-os-10-2-4-known-and-addressed-issues/pan-os-10-2-4-addressed-issues