Pf Configuration Incompatible With Pf Program Version Upd Here
PF uses an internal DIOCX version number. Use pfctl -si (status info) and look for “Version”:
sysctl kern.version
If you are on pfSense and accidentally broke compatibility by installing standard FreeBSD packages: Chris's Wiki :: blog/unix/FreeBSDPFHasCaughtUp pf configuration incompatible with pf program version