CNAME record fails to be added:
PLESK_ERROR: Error: Incorrect combination of DNS records is present in the DNS zone
There is the following structure in the DNS settings:
CONFIG_TEXT: domain.example.com CNAME domain1.example.com
domain1.example.com CNAME domain2.example.com
Incorrect DNS structure. According to RFC 1912, CNAME record pointing to another CNAME record is considered a mistake and, therefore, it is not supported by DNS providers.
In order to create desired CNAME record for
domain1.example.com, consider changing or deleting already existing CNAME record