On our website, when I try to configure DNS, it does a test and gives me the below error.
www.evergreenvisuals.com is configured with a CNAME record pointing to evergreenvisuals.com, which in turn resolves to the Zenfolio IP address of 18.104.22.168. This configuration is permitted but not recommended since it prohibits the use of CDN. It is recommended that you configure www.evergreenvisuals.com with a CNAME record pointing to custom.zenfolio.com.
I don't understand. www of my domain already has a CNAME to custom.zenfolio.com so how do I add a CNAME to my CNAME?