Error when creating new account

[sinsor]

When I go to make a new account, I fill everything in and then click the button to confirm, and it gives me the following error message:

1062 Duplicate entry '' for key 2
in:
[insert into phpbb_users (user_id, username, user_password, user_email, user_regdate) values ('54', 'FORUMNICKNAME', 'faadd36f4cf23272d0844461965caf82', '[email protected]', '1258481972')]

The parts in caps being the actual forum nickname and email address put in for the account. I think that it may be a problem with my forum. I don't want a forum at all, though, and I may have half-installed a forum (I don't remember).

Is there any way that I can fix this, and get rid of the forum all together?

[jcdk]

try this thread, somebody had the same issue

http://www.zen-cart.com/forum/showthread.php?t=47122