The incompatibility is almost always . Either update your config file to match the running system’s pfctl + kernel, or align your PF userland with the kernel version.
In environments like pfSense or industrial controllers, a configuration file restored from a different hardware model may contain interface names or features that the current system's version does not recognize. Step-by-Step Troubleshooting and Fixes 1. Perform a Syntax "Dry Run" pf configuration incompatible with pf program version
Administrators should rewrite legacy rules to conform to modern standards. The incompatibility is almost always