The DNS server encountered an invalid preference value "{0}" in zone file {1} at line {2}. The preference must be a valid ...

The DNS server encountered an invalid preference value "{0}" in zone file {1} at line {2}.  The preference must be a valid 16-bit unsigned integer. To correct the problem, modify the preference field to a valid value. The zone file {1} is located in the %SystemRoot%\System32\Dns directory.