Index: branches/version-2_12-dev/data/class/pages/admin/products/LC_Page_Admin_Products.php
===================================================================
--- branches/version-2_12-dev/data/class/pages/admin/products/LC_Page_Admin_Products.php	(revision 21693)
+++ branches/version-2_12-dev/data/class/pages/admin/products/LC_Page_Admin_Products.php	(revision 21740)
@@ -297,5 +297,5 @@
             // 商品コード
             case 'search_product_code':
-                $where .= ' AND product_id IN (SELECT product_id FROM dtb_products_class WHERE product_code ILIKE ? GROUP BY product_id)';
+                $where .= ' AND product_id IN (SELECT product_id FROM dtb_products_class WHERE product_code ILIKE ?)';
                 $arrValues[] = sprintf('%%%s%%', $objFormParam->getValue($key));
                 break;