Fehlermeldung beim speichern eines neuen Artikels

shopware 5.7.16
Wenn ich neue Artikel einstellen möchte erhalte ich eine Fehlermeldung beim Speichern:

Model of „Shopware\Models\Article\Article“ for id „0“ not found

Im logfile steht:
Shopware\Components\Model\Exception\ModelNotFoundException: Model of „Shopware\Models\Article\Article“ for id „0“ not found in /engine/Shopware/Controllers/Backend/Article.php:218 Stack trace:
#0 /engine/Library/Enlight/Controller/Action.php(187): Shopware_Controllers_Backend_Article->saveAction()
#1 /engine/Library/Enlight/Controller/Dispatcher/Default.php(467): Enlight_Controller_Action->dispatch()
#2 /engine/Library/Enlight/Controller/Front.php(225): Enlight_Controller_Dispatcher_Default->dispatch()
#3 /engine/Shopware/Kernel.php(197): Enlight_Controller_Front->dispatch()
#4 /vendor/symfony/http-kernel/HttpCache/SubRequestHandler.php(85): Shopware\Kernel->handle()
#5 /vendor/symfony/http-kernel/HttpCache/HttpCache.php(479): Symfony\Component\HttpKernel\HttpCache\SubRequestHandler::handle()
#6 /engine/Shopware/Components/HttpCache/AppCache.php(266): Symfony\Component\HttpKernel\HttpCache\HttpCache->forward()
#7 /vendor/symfony/http-kernel/HttpCache/HttpCache.php(269): Shopware\Components\HttpCache\AppCache->forward()
#8 /engine/Shopware/Components/HttpCache/AppCache.php(106): Symfony\Component\HttpKernel\HttpCache\HttpCache->pass()
#9 /data/web/1/000///*****/htdocs/shopware/shopware.php(122): Shopware\Components\HttpCache\AppCache->handle()
#10