Synchronization of DNS zone for domain alias with main domain fails with error:
Error: Unable to restore the DNS zone: an error occurred while adding the <domain.tld>. IN CNAME <different_domain.tld>. record: Incorrect combination of DNS records is present in the DNS zone
A CNAME record cannot coexist with any other records for the same name, because a name cannot both be an alias (CNAME) and other record at the same time. Please refer to RFC 1912 for more information:
If domain.tld is CNAME record, make sure that you do not have any other record that point to the same name.
In other words:
domain.tld CNAME qwedomain.tld
cannot coexist with the following record:
testdomain.tld CNAME domain.tld