I’m trying to add a custom domain to one of my websites. The website should have the subdomain 2019.heartbits.pt, however Netlify says “Another site is already using this domain”. I have no clue what website is using this subdomain. The heartbits.pt domain is using Netlify DNS under this account.
Is it possible to remove the subdomain from whatever site is using it, please?
EDIT: I’ve done the verification steps as stated here