Domain in use by another unknown account

Domain in use by another unknown account

As mentioned, completing the verification is not enough: the domain cannot be fully used in the account. Could we get some assistance with this issue?

Domain in use by another unknown account

Hello, We have a domain name `irvinehacks.com` added to our Vercel project, but Vercel says our account/team does not have full access to the domain. > Another Vercel account is...