DNS
8 NXRRSET
RR Set that should exist does not. A required resource record set is missing from the zone.
Cuándo verás este código
A DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
Cómo solucionarlo
Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.