protected function _copyArtExtends($sOldId, $sNewId)
    {
        $oExt = oxNew(\OxidEsales\Eshop\Core\Model\BaseModel::class);
        $oExt->init("oxartextends");
        $oExt->load($sOldId);
        $oExt->setId($sNewId);
        $oExt->save();
    }