Unable to change/add cname record in Advanced Zone Editor


New member
i want to change the cname of my main domain name to the one my cdn provider.

when ever i try to add a record to my main domain without www, it gives me an error saying SOA record already exists.

i have successfully changed the record for "www.xyz.com" but i can't do the same for "xyz.com"

also i have checked whether a record already exists or not and there are none shown in the zone editor.