Fatal error: Invalid SQL: SELECT * FROM wcf1_session WHERE sessionID = '56d5dae124b329d555e3f2d6d46cd69a5b4e5d4d' 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 = '56d5dae124b329d555e3f2d6d46cd69a5b4e5d4d' 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: Sat, 11 Jul 2020 06:02:06 +0000
request: /index.php?page=Register&s=56d5dae124b329d555e3f2d6d46cd69a5b4e5d4d
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('56d5dae124b329d...')
#3 /var/www/vhosts/ratsclanseite.de/subdomains/wbb/httpdocs/wcf/lib/system/session/SessionFactory.class.php(66): SessionFactory->getExistingSession('56d5dae124b329d...')
#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}