Touchscreen-Drehkugelschreiber "Neptun"

Fatal error: Uncaught PDOException: SQLSTATE[40001]: Serialization failure: 1213 Deadlock found when trying to get lock; try restarting transaction in /var/www/html/vendor/shopware/shopware/engine/Shopware/Components/Session/PdoSessionHandler.php:541 Stack trace: #0 /var/www/html/vendor/shopware/shopware/engine/Shopware/Components/Session/PdoSessionHandler.php(541): PDOStatement->execute() #1 /var/www/html/vendor/shopware/shopware/engine/Shopware/Components/Session/PdoSessionHandler.php(296): Shopware\Components\Session\PdoSessionHandler->doRead() #2 /var/www/html/vendor/symfony/http-foundation/Session/Storage/Proxy/SessionHandlerProxy.php(64): Shopware\Components\Session\PdoSessionHandler->read() #3 [internal function]: Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy->read() #4 /var/www/html/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php(192): session_start() #5 /var/www/html/vendor/symfony/http-foundation/Session/Session.php(57): Symfony\Component\HttpFoundation\Sessio in /var/www/html/vendor/shopware/shopware/engine/Shopware/Components/Session/PdoSessionHandler.php on line 541