small fix to list products with a unknown tagid2 and for pnns groups value unknown
small fix to list products with a unknown tagid2 and for pnns groups value unknown

openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server