Forum Signin: An account could not be registered on email

Hi there,

Before the migration from drupal to wordpress I had set-up two email addresses on my forum account, now, since the non-primary email is already in use for this account, no new account can be registered. My subscription is on the non primary email account (hotmail), but my forum account with all my achievements, posts etc is on my primary email. There also is a site account for the primary email account which is what I currently use to signin to the forums.

What is the best way to go around this?