When i am 'Authenticating Your Custom Email Domain' in godaddy do add a new record or replace existing CNAMES?

Question:
When i am ‘Authenticating Your Custom Email Domain’ in godaddy do add a new record or replace existing CNAMES?

Product:
Authenticating Your Custom Email Domain

What are you trying to achieve:
Authenticating Your Custom Email Domain

What have you already tried:
[Share resources, forum topics, articles, or tutorials you’ve already used to try and answer your question.]

Additional information:
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If there is a CNAME record with same name(credentials) then replace it.

If there are no conflicting CNAME records, in that case, you can add a new record