Discuz! Database Error

The database has encountered a problem. Need Help?

Error messages:

[Type] 查询语句错误 [145] Table '.\yszq\common_cron' is marked as crashed and should be repaired [Query] SELECT * FROM common_cron WHERE available>'0' AND nextrun<='1550778821' 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) [Line: 0801]source\class\class_core.php(db_mysql_slave->query)

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