A组组队提交确认出现数据库出错

A组组队提交确认， 出现数据库出错， 退出组队重新输入一次，还是同样问题，何解？
A Database Error Occurred

Error Number: 1064

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 &apos WHERE ActivityID = 85 AND TeamID = 28564' at line 1

UPDATE activity_teams SET Status = '2' ,SignUpDate = time() WHERE ActivityID = 85 AND TeamID = 28564

Filename: /home/doyouhike/production/www/application_3.1.4/controllers/activity/team.php

Line Number: 444