DNS
8 NXRRSET
RR Set that should exist does not. A required resource record set is missing from the zone.
このコードが表示された場合
A DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
修正方法
Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.