DNS name contains records that are incompatible with the CNAME record
Issue:
You receive one of the following messages when creating a new DNS record.
A new record cannot be created.
An alias (CNAME) record cannot be added to this DNS name. The DNS name contains records that are incompatible with the CNAME record.
A new record cannot be created.
Node is a CNAME DNS record.
Cause:
Per RFC1034 DOMAIN NAMES – CONCEPTS AND FACILITIES The domain system provides such a feature using the canonical name (CNAME) RR. A CNAME RR identifies its owner name as an alias, and specifies the corresponding canonical name in the RDATA section of the RR. If a CNAME RR is present at a node, no other data should be present; this ensures that the data for a canonical name and its aliases cannot be different. This rule also insures that a cached CNAME can be used without checking with an authoritative server for other RR types.
This means if that if you create a CNAME with record (aka: node) called www no other record types can exist with this same name. The same is true if you create a CNAME record without a name (aka: same as parent folder), no other records types can exists. The reverse of these scenarios is also true, you cannot create any other record types with the same name as an existing CNAME record.
What the RFC doesn