Another site is already using this domain, deleted account

I’m not able to add a custom domain on one of my site : CNAME ⇨ Another site is already using this domain

I guess this is due to another account I deleted recently.

Can someone help me please?

You wrote into the helpdesk where we’re in conversation about this, so we won’t continue this thread here in the community as well.

In the future, please open only one thread about problems you’re having so we can most efficiently help you and other customers - duplicate threads wastes our team’s time. Thanks in advance!