DCTL1033

multiInstance with CNAME on @ does not make sense

The multiInstance indicates that the template is designed to be applied multiple times to the same domain and host. When the host is @, the result of applying the template multiple times will always conflict with itself.

Fix: Either set multiInstance to false, or change the CNAME record to use a different host (not @). CNAME records at the zone apex cannot be applied multiple times without conflict.