doku

Hello, I'm trying to migrate a friend's website over to my account as an addon domain. I've gone ahead and deleted his account, "alexsto" which should mean his domain is no longer tied to his account. However, when I try to add it as an addon to my domain, CPanel doesn't let me because it still thinks it's owned by his account. The domain in question is alexanderstocktonfilms.com previously owned by "alexsto", and I'm trying to migrate it over to my account, "doku". Thanks!