注册出现了问题，请问这个怎么改？

tuchpuppe

Discuz! info: MySQL Query Error

Time: 2008-6-20 5:18pm
Script: /register.php

SQL: INSERT INTO [Table]members (uid, username, password, secques, gender, adminid, groupid, regip, regdate, lastvisit, lastactivity, posts, credits, extcredits1, extcredits2, extcredits3, extcredits4, extcredits5, extcredits6, extcredits7, extcredits8, email, bday, sigstatus, tpp, ppp, styleid, dateformat, timeformat, pmsound, showemail, newsletter, invisible, timeoffset)
VALUES ('20893', 'TXT', 'caec9423b9d4bf7076bada6f6ba29336', '', '0', '0', '8', '125.92.28.66', '1213953502', '1213953502', '1213953502', '0', 0,0,10,0,0,0,0,0,0, 'TXT@XXX.com', '0000-00-00', '0', '0', '0', '', '0', '0', '1', '', '1', '0', '9999')
Error: Duplicate entry '20893' for key 1
Errno.: 1062

到 http://faq.comsenz.com 搜索此错误的解决方案

在论坛上注册出现这个问题，应该是uid算法判断错误才出现的
但是出现这个问题用户还是存在了ucenter里面
请问这个到底怎么解决？