Api\Resource\Article create() erzeugt Exception

Fatal error: Cannot use Shopware\Models\Customer\Group as CustomerGroup because the name is already in use in <Shopware_Path>\engine\Shopware\Components\Api\Resource\Variant.php on line 35

StackTrace:
15	9.1860	16935808	Shopware\Components\Api\Resource\Article->create( ??? )	..\Article.php:690
16	10.8441	17052640	Shopware\Components\Api\Resource\Article->prepareAssociatedData( ???, ??? )	..\Article.php:510
17	12.6738	17213432	Shopware\Components\Api\Resource\Article->prepareMainDetail( ???, ??? )	..\Article.php:708
18	12.6779	17275800	Shopware\Components\Api\Resource\Article->getVariantResource( )	..\Article.php:731
19	12.6779	17275912	Shopware\Components\Api\Resource\Resource->getResource( ??? )	..\Article.php:69
20	12.6780	17276328	spl_autoload_call ( ??? )	..\Article.php:120
21	12.6780	17276384	Composer\Autoload\ClassLoader->loadClass( ??? )	..\Article.php:0
22	12.6781	17276384	Composer\Autoload\includeFile( ??? )	..\ClassLoader.php:269


Durch Ändern des Aliases im using wird dieses Problem behoben.