Ups! An error has occurred!
The following hints should help you.
Entity has to be managed or scheduled for removal for single computation Shopware\Models\Tracking\Banner@000000000f2cbef500000000409b7e11 in vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php on line 475
Stack trace:
#0 vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php(342): Doctrine\ORM\UnitOfWork->computeSingleEntityChangeSet(Object(Shopware\Models\Tracking\Banner)) #1 vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php(356): Doctrine\ORM\UnitOfWork->commit(Object(Shopware\Models\Tracking\Banner)) #2 engine/Shopware/Controllers/Frontend/Tracking.php(73): Doctrine\ORM\EntityManager->flush(Object(Shopware\Models\Tracking\Banner)) #3 engine/Library/Enlight/Controller/Action.php(159): Shopware_Controllers_Frontend_Tracking->countBannerClickAction() #4 engine/Library/Enlight/Controller/Dispatcher/Default.php(530): Enlight_Controller_Action->dispatch('countBannerClic...') #5 engine/Library/Enlight/Controller/Front.php(223): Enlight_Controller_Dispatcher_Default->dispatch(Object(Enlight_Controller_Request_RequestHttp), Object(Enlight_Controller_Response_ResponseHttp)) #6 engine/Shopware/Kernel.php(191): Enlight_Controller_Front->dispatch() #7 vendor/symfony/http-kernel/HttpCache/HttpCache.php(484): Shopware\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #8 engine/Shopware/Components/HttpCache/AppCache.php(268): Symfony\Component\HttpKernel\HttpCache\HttpCache->forward(Object(Symfony\Component\HttpFoundation\Request), true, NULL) #9 vendor/symfony/http-kernel/HttpCache/HttpCache.php(441): Shopware\Components\HttpCache\AppCache->forward(Object(Symfony\Component\HttpFoundation\Request), true) #10 vendor/symfony/http-kernel/HttpCache/HttpCache.php(337): Symfony\Component\HttpKernel\HttpCache\HttpCache->fetch(Object(Symfony\Component\HttpFoundation\Request), true) #11 engine/Shopware/Components/HttpCache/AppCache.php(189): Symfony\Component\HttpKernel\HttpCache\HttpCache->lookup(Object(Symfony\Component\HttpFoundation\Request), true) #12 vendor/symfony/http-kernel/HttpCache/HttpCache.php(203): Shopware\Components\HttpCache\AppCache->lookup(Object(Symfony\Component\HttpFoundation\Request), true) #13 engine/Shopware/Components/HttpCache/AppCache.php(116): Symfony\Component\HttpKernel\HttpCache\HttpCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #14 shopware.php(118): Shopware\Components\HttpCache\AppCache->handle(Object(Symfony\Component\HttpFoundation\Request)) #15 {main}