I want to transfer a domain in to my Vercel account from a third-party register. I have the authorization code and the domain is unlocked, but when trying to action the transfer it shows the error: “The domain `interventionarchitecture.com` already exists” (it is already connected to an existing project as a third-party existing domain).
How can I complete the registrar transfer to Vercel? Can it be done without any downtime on the site?
