The DNS server has detected that the zone %1 has a missing or corrupted zone type in registry data. To correct the problem, ...

The DNS server has detected that the zone %1 has a missing or corrupted zone type in registry data.  To correct the problem, you can delete the applicable zone subkey, located under DNS server parameters in the registry.   You can then recreate the zone using the DNS console.  For more information, see "Tuning advanced server parameters" and "Add and Remove Zones" in the online Help.