119行目あたり

// 表示順序
$objQuery->setorder($order);

に

// 表示順序
$objQuery->setorder($order);
//重複行の削除
$objQuery->setgroupby($group);

を追加。

SELECT allcls.* FROM dtb_customer_favorite_products AS dcfp LEFT JOIN vw_products_allclass AS allcls USING(product_id) WHERE allcls.del_flg = 0 AND allcls.status = 1 AND dcfp.customer_id = ? GROUP BY product_id ORDER BY product_id DESC LIMIT 10 OFFSET 0
DB Error: unknown error

SELECT allcls.* FROM dtb_customer_favorite_products AS dcfp LEFT JOIN vw_products_allclass AS allcls USING(product_id) WHERE allcls.del_flg = 0 AND allcls.status = 1 AND dcfp.customer_id = '1' GROUP BY product_id ORDER BY product_id DESC LIMIT 10 OFFSET 0 [nativecode=ERROR: column "allcls.product_id" must appear in the GROUP BY clause or be used in an aggregate function]