Discuz! Database Error

The database has encountered a problem. Need Help?

Error messages:

[Type] 查询语句错误 [145] Table '.\xiaoganmysql\common_session' is marked as crashed and should be repaired [Query] DELETE FROM common_session WHERE sid='99Y1HN' OR lastactivity<1540288597 OR (uid='0' AND ip1='54' AND ip2='224' AND ip3='247' AND ip4='42' AND lastactivity>1540289437)

Program messages:

[Line: 0030]portal.php(require_once) [Line: 0030]source\module\portal\portal_index.php(include_once) [Line: 0408]data\template\7_diy_portal_index.tpl.php(updatesession) [Line: 0061]source\function\function_core.php(discuz_session->update) [Line: 1075]source\class\class_core.php(discuz_session->delete) [Line: 1067]source\class\class_core.php(DB->delete) [Line: 0776]source\class\class_core.php(DB->query) [Line: 0843]source\class\class_core.php(DB->_execute)

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