Theme Manager - Fehler 503

Hallo zusammen,

im Zuge der Umstellungen auf PHP 7 und dem Löschen einiger hartnäckiger Plugins ist irgendetwas mit dem Theme Manager durcheinander gekommen.

Im Logfile wird folgender Fehler dokumentiert:

Doctrine\ORM\EntityNotFoundException: Entity of type ‚Shopware\Models\Plugin\Plugin‘ for IDs id(129) was not found in /vendor/doctrine/orm/lib/Doctrine/ORM/EntityNotFoundException.php:47 Stack trace:
#0 /vendor/doctrine/orm/lib/Doctrine/ORM/Proxy/ProxyFactory.php(196): Doctrine\ORM\EntityNotFoundException::fromClassNameAndIdentifier(‚Shopware\Models…‘, Array)
#1 /kunden/184663_50829/uniflame/var/cache/production_201902250948/doctrine/proxies/__CG__ShopwareModelsPluginPlugin.php(791): Doctrine\ORM\Proxy\ProxyFactory->Doctrine\ORM\Proxy{closure}(Object(Shopware\Proxies__CG__\Shopware\Models\Plugin\Plugin), ‚isLegacyPlugin‘, Array)
#2 /kunden/184663_50829/uniflame/var/cache/production_201902250948/doctrine/proxies/__CG__ShopwareModelsPluginPlugin.php(791): Closure->__invoke(Object(Shopware\Proxies__CG__\Shopware\Models\Plugin\Plugin), ‚isLegacyPlugin‘, Array)
#3 /engine/Shopware/Components/Theme/PathResolver.php(140): Shopware\Proxies__CG__\Shopware\Models\Plugin\Plugin->isLegacyPlugin()
#4 /engine/Shopware/Components/Theme/PathResolver.php(391): Shopware\Components\Theme\PathResolver->getPluginPath(Object(Shopware\Proxies__CG__\Shopware\Models\Plugin\Plugin))
#5 /engine/Shopware/Components/Theme/PathResolver.php(92): Shopware\Components\Theme\PathResolver->getThemeDirectory(Object(Shopware\Models\Shop\Template))
#6 /engine/Shopware/Components/Theme/Util.php(192): Shopware\Components\Theme\PathResolver->getDirectory(Object(Shopware\Models\Shop\Template))
#7 /engine/Shopware/Components/Theme/Util.php(79): Shopware\Components\Theme\Util->getThemeImage(Object(Shopware\Models\Shop\Template))
#8 /engine/Shopware/Controllers/Backend/Theme.php(387): Shopware\Components\Theme\Util->getPreviewImage(Object(Shopware\Models\Shop\Template))
#9 /engine/Shopware/Controllers/Backend/Application.php(210): Shopware_Controllers_Backend_Theme->getList(‚0‘, ‚20‘, Array, Array, Array)
#10 /engine/Shopware/Controllers/Backend/Theme.php(205): Shopware_Controllers_Backend_Application->listAction()
#11 /engine/Library/Enlight/Controller/Action.php(193): Shopware_Controllers_Backend_Theme->listAction()
#12 /engine/Library/Enlight/Controller/Dispatcher/Default.php(563): Enlight_Controller_Action->dispatch(‚listAction‘)
#13 /engine/Library/Enlight/Controller/Front.php(222): Enlight_Controller_Dispatcher_Default->dispatch(Object(Enlight_Controller_Request_RequestHttp), Object(Enlight_Controller_Response_ResponseHttp))
#14 /engine/Shopware/Kernel.php(202): Enlight_Controller_Front->dispatch()
#15 /vendor/symfony/http-kernel/HttpCache/SubRequestHandler.php(102): Shopware\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#16 /vendor/symfony/http-kernel/HttpCache/HttpCache.php(448): Symfony\Component\HttpKernel\HttpCache\SubRequestHandler::handle(Object(Shopware\Kernel), Object(Symfony\Component\HttpFoundation\Request), 1, true)
#17 /engine/Shopware/Components/HttpCache/AppCache.php(268): Symfony\Component\HttpKernel\HttpCache\HttpCache->forward(Object(Symfony\Component\HttpFoundation\Request), true, NULL)
#18 /vendor/symfony/http-kernel/HttpCache/HttpCache.php(238): Shopware\Components\HttpCache\AppCache->forward(Object(Symfony\Component\HttpFoundation\Request), true)
#19 /engine/Shopware/Components/HttpCache/AppCache.php(105): Symfony\Component\HttpKernel\HttpCache\HttpCache->pass(Object(Symfony\Component\HttpFoundation\Request), true)
#20 /kunden/184663_50829/uniflame/shopware.php(122): Shopware\Components\HttpCache\AppCache->handle(Object(Symfony\Component\HttpFoundation\Request))
#21 {main}

Kann mir da jemand helfen ?