论坛不能注册请求帮助！

我不知道搞到什么地方现在注册就出错注册以后提示这个：
Discuz! info: MySQL Query Error

Time: 2008-8-30 11:12pm
Script: /register.php

SQL: INSERT INTO [Table]memberfields (uid, nickname, site, icq, qq, yahoo, msn, taobao, alipay, location, bio, sightml, customstatus, authstr )
VALUES ('42', '', '', '', '', '', '', '', '', '', '', '', '', '' )
Error: Duplicate entry '42' for key 1
Errno.: 1062

到 http://faq.comsenz.com 搜索此错误的解决方案