Fatal error: Invalid SQL: SELECT * FROM wcf1_session WHERE sessionID = 'd76783cb3db44bea5cbf4ff231a8a3fa14be2c00' LIMIT 1

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=145

Information:

error message: Invalid SQL: SELECT * FROM wcf1_session WHERE sessionID = 'd76783cb3db44bea5cbf4ff231a8a3fa14be2c00' LIMIT 1
error code: 145
sql type: MySQLDatabase
sql error: Table './web864_wbb/wcf1_session' is marked as crashed and should be repaired
sql error number: 145
sql version:
file: /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/wcf/lib/system/database/MySQLDatabase.class.php (116)
php version: 5.5.38
wcf version: 1.0.11 pl 3 (Horizon)
date: Sun, 09 Aug 2020 05:21:36 +0000
request: /index.php?form=Search&action=unread&s=d76783cb3db44bea5cbf4ff231a8a3fa14be2c00
referer:

Stacktrace:

#0 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/wcf/lib/system/database/Database.class.php(116): MySQLDatabase->sendQuery('SELECT \t* \n\t\t\t\t...', 1, 0)
#1 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/wcf/lib/system/session/Session.class.php(91): Database->getFirstRow('SELECT \t* \n\t\t\t\t...')
#2 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/wcf/lib/system/session/SessionFactory.class.php(96): Session->__construct('d76783cb3db44be...')
#3 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/wcf/lib/system/session/SessionFactory.class.php(66): SessionFactory->getExistingSession('d76783cb3db44be...')
#4 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/lib/system/WBBCore.class.php(201): SessionFactory->get()
#5 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/wcf/lib/system/WCF.class.php(91): WBBCore->initSession()
#6 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/global.php(18): WCF->__construct()
#7 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/index.php(7): require_once('/var/www/vhosts...')
#8 {main}