API Key Assistance please

for some reason i cannt add a new API key to the site > http://www.oldskoolmusicuk.com.

I have a few wordpress sites. The other is http://www.allforoneinsultz.com.

I registered an API on a personal email ending oldskoolmusicuk for the http://www.allforoneinsultz.com.

Now when it comes to me setting up a new API for the website http://www.oldskoolmusicuk.com. it says APT already in use.

Ive tried to set up a new wordpress account to get a new API but it wont let me as the email is regisiterd to the other site ?

I have tried to log in and change the e mail address , but it wil not let me.

How can i reasign a new API KEY to my e mail address associated with the domain http://www.oldskoolmusicuk.com. ?

Thanks .

I have wordpress stats running on a domain with a incorrect e mail.