大大们帮忙解决下，在没有任何改动的情况下论坛出现了这个问题，请帮忙看看是什么情况

Discuz! Database Error

The database has encountered a problem. Need Help?

Error messages:

[Type] 查询语句错误 [145] Table '.\sq_immgame\common_cron' is marked as crashed and should be repaired [Query] SELECT * FROM common_cron WHERE available>'0' AND nextrun<='1364968978' ORDER BY nextrun LIMIT 1

Program messages:

[Line: 0051]forum.php(discuz_core->init) [Line: 0071]source\class\class_core.php(discuz_core->_init_cron) [Line: 0452]source\class\class_core.php(discuz_cron->run) [Line: 0023]source\class\class_cron.php(DB->fetch_first) [Line: 0971]source\class\class_core.php(DB->_execute) [Line: 1011]source\class\class_core.php(db_mysql->fetch_first)

www.immgame.com 已经将此出错信息详细记录, 由此给您带来的访问不便我们深感歉意

common_cron 数据表错误，修复下这个表

请问如何修复呢，本人不会，请高手详细解答下吧，莫名气妙就出问题了