Update von 4.x auf 5.x

Hallo ..

da wir 5.0 gar nicht installieren konnten ..
hab ich 4.x installiert und das das Systemeigene Update System genutzt...
Läuft alles Fehlerfrei durch ...
Will ich dann ins Backend :

Ups! Ein Fehler ist aufgetreten!
Die nachfolgenden Hinweise sollten Ihnen weiterhelfen.
Zend_Session::start() - /var/www/virtual/dasgewuerz.de/htdocs/engine/Library/Zend/Db/Table/Abstract.php(Line:839): Error #1024 Failed saving metadata to metadataCache in Zend/Session.php on line 506
Stack trace:
#0 Shopware/Plugins/Default/Backend/Auth/Bootstrap.php(402): Zend_Session::start(Array)
#1 Enlight/Event/Handler/Plugin.php(149): Shopware_Plugins_Backend_Auth_Bootstrap->onInitResourceBackendSession(Object(Enlight_Event_EventArgs))
#2 Enlight/Event/EventManager.php(252): Enlight_Event_Handler_Plugin->execute(Object(Enlight_Event_EventArgs))
#3 Shopware/Components/DependencyInjection/Container.php(247): Enlight_Event_EventManager->notifyUntil('Enlight_Bootstr...', Array)
#4 Shopware/Bootstrap.php(168): Shopware\Components\DependencyInjection\Container->load('BackendSession')
#5 Shopware/Plugins/Default/Backend/Auth/Bootstrap.php(468): Shopware_Bootstrap->loadResource('BackendSession')
#6 Enlight/Event/Handler/Plugin.php(149): Shopware_Plugins_Backend_Auth_Bootstrap->onInitResourceAuth(Object(Enlight_Event_EventArgs))
#7 Enlight/Event/EventManager.php(252): Enlight_Event_Handler_Plugin->execute(Object(Enlight_Event_EventArgs))
#8 Shopware/Components/DependencyInjection/Container.php(247): Enlight_Event_EventManager->notifyUntil('Enlight_Bootstr...', Array)
#9 Shopware/Components/DependencyInjection/Container.php(142): Shopware\Components\DependencyInjection\Container->load('auth')
#10 Shopware/Bootstrap.php(124): Shopware\Components\DependencyInjection\Container->has('Auth')
#11 Enlight/Application.php(452): Shopware_Bootstrap->hasResource('Auth')
#12 Shopware/Plugins/Default/Backend/Auth/Bootstrap.php(507): Enlight_Application->__call('Auth', Array)
#13 Shopware/Plugins/Default/Backend/Auth/Bootstrap.php(507): Shopware->Auth()
#14 Shopware/Plugins/Default/Backend/Auth/Bootstrap.php(265): Shopware_Plugins_Backend_Auth_Bootstrap->getCurrentLocale()
#15 Shopware/Plugins/Default/Backend/Auth/Bootstrap.php(208): Shopware_Plugins_Backend_Auth_Bootstrap->initLocale()
#16 Enlight/Event/Handler/Plugin.php(149): Shopware_Plugins_Backend_Auth_Bootstrap->onPreDispatchBackend(Object(Enlight_Controller_ActionEventArgs))
#17 Enlight/Event/EventManager.php(211): Enlight_Event_Handler_Plugin->execute(Object(Enlight_Controller_ActionEventArgs))
#18 Enlight/Controller/Action.php(138): Enlight_Event_EventManager->notify('Enlight_Control...', Object(Enlight_Controller_ActionEventArgs))
#19 Enlight/Controller/Dispatcher/Default.php(524): Enlight_Controller_Action->dispatch('indexAction')
#20 Enlight/Controller/Front.php(227): Enlight_Controller_Dispatcher_Default->dispatch(Object(Enlight_Controller_Request_RequestHttp), Object(Enlight_Controller_Response_ResponseHttp))
#21 Shopware/Kernel.php(143): Enlight_Controller_Front->dispatch()
#22 vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpCache/HttpCache.php(490): Shopware\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#23 Shopware/Components/HttpCache/AppCache.php(255): Symfony\Component\HttpKernel\HttpCache\HttpCache->forward(Object(Symfony\Component\HttpFoundation\Request), true, NULL)
#24 vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpCache/HttpCache.php(261): Shopware\Components\HttpCache\AppCache->forward(Object(Symfony\Component\HttpFoundation\Request), true)
#25 Shopware/Components/HttpCache/AppCache.php(103): Symfony\Component\HttpKernel\HttpCache\HttpCache->pass(Object(Symfony\Component\HttpFoundation\Request), true)
#26 shopware.php(101): Shopware\Components\HttpCache\AppCache->handle(Object(Symfony\Component\HttpFoundation\Request))
#27 {main}


Im Frontend hab ich nur ne weiße Seite.

Gruß
Michael