"Another site is already using this domain" despite domain removal from the first account

I’m trying to link bobamunch.com and www.bobamunch.com to Netlify. My friend had set up our group’s website originally on his personal Netlify account with those two domains but has removed both domains from his production domains. Despite doing so, I’m currently unable to add those two domains to our organization’s Netlify account.

Created the DNS record for bobamunch.com as outlined on this page.

The domain has been removed from the other account.