不能发表签到贴

gamersmile

请求hope或管理员解决下这个问题：
发帖后点击每日签到，返回结果异常。
相关提示如下：

Discuz! info: MySQL Query Error

User: gamersmile
Time: 2012-1-29 10:09pm
Script: /bank.php

SQL: UPDATE [Table]members SET extcredits2=extcredits2+1+ WHERE uid='150658'
Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE uid='150658'' at line 1
Errno.: 1064

Similar error report has beed dispatched to administrator before.