Discuz! Database Error

The database has encountered a problem. Need Help?

Error messages:

[Type] 查询语句错误 [145] Table './doudou/common_cron' is marked as crashed and should be repaired [Query] SELECT * FROM common_cron WHERE available>'0' AND nextrun<='1327751079' 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: 0444]source/class/class_core.php(discuz_cron->run) [Line: 0023]source/class/class_cron.php(DB->fetch_first) [Line: 0963]source/class/class_core.php(DB->_execute) [Line: 1003]source/class/class_core.php(db_mysql->fetch_first)

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