The DNS server has detected that for the primary zone {0} its has no zone file name stored in registry data. You can either ...

The DNS server has detected that for the primary zone {0} its has no zone file name stored in registry data.  You can either update the zone file name or delete the zone and recreate it using the DNS console.  To delete the applicable zone from the registry, locate its subkey under DNS server parameters in the registry.  You can then recreate the zone using the DNS console.  For more information, see "To change a zone file name", "Tuning advanced server parameters" and "Add and Remove Zones" in the online Help.