[問題]會員註冊的問題~~

[大米糕]

我想請問一下我的會員在註冊時都說不能註冊~~
就出現以下這些文字~~
然後過一會兒就說可以註冊了~~
好像每個註冊的人都有這個問題~~
麻煩幫我解答一下~~
一般錯誤
Could not insert data into users table

DEBUG MODE

SQL Error : 1062 Duplicate entry '5' for key 1

INSERT INTO phpbb_users (user_id, username, user_regdate, user_password, user_email, user_icq, user_website, user_occ, user_from, user_interests, user_sig, user_sig_bbcode_uid, user_avatar, user_avatar_type, user_viewemail, user_aim, user_yim, user_msnm, user_attachsig, user_allowsmile, user_allowhtml, user_allowbbcode, user_allow_viewonline, user_notify, user_notify_pm, user_popup_pm, user_timezone, user_dateformat, user_lang, user_style, user_level, user_allow_pm, user_active, user_actkey) VALUES (5, 'COKA', 1058527623, 'c18ca3585403bf986dc1fc77f72d757f', 'gunydydy@yahoo.com', '', '', '', '', '', '', '', '', 0, 0, '', '', '', 0, 1, 0, 1, 1, 0, 1, 1, -8, 'D M d, Y g:i a', 'chinese_tra

[澳門男孩]

http://phpbb-tw.net/phpbb/viewtopic.php?t=15329