Fatal error: Uncaught Doctrine\ORM\Mapping\MappingException: No identifier/primary key specified for Entity "Shopware\Models\Attribute\CustomerGroup" sub class of "Shopware\Components\Model\ModelEntity". Every Entity must have an identifier/primary key. in /www/htdocs/w01570e6/shoptest.nikoliquids24.de/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/MappingException.php:46 Stack trace: #0 /www/htdocs/w01570e6/shoptest.nikoliquids24.de/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php(1009): Doctrine\ORM\Mapping\MappingException::identifierRequired('Shopware\\Models...') #1 /www/htdocs/w01570e6/shoptest.nikoliquids24.de/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php(271): Doctrine\ORM\Mapping\ClassMetadataInfo->validateIdentifier() #2 /www/htdocs/w01570e6/shoptest.nikoliquids24.de/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/ClassMetadataFactory.php(251): Doctrine\ORM\Mapping\ClassMetadataFactory->validateRuntimeMetadata(Object(Doctrine\ORM\Mapping\ClassMetadata), NULL) #3 /www/htdocs/w in /www/htdocs/w01570e6/shoptest.nikoliquids24.de/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/MappingException.php on line 46