お世話になります。

管理画面にて受注期間を指定して検索をするとシステムエラーが発生してしまいます。

以前に、下記のページのカスマイズを致しました。
http://xoops.ec-cube.net/modules/newbb/viewtopic.php?viewmode=flat&topic_id=13791&forum=11

どなたかご教授頂けませんでしょうか？

EC-CUBEバージョン 2.12.2
PHPバージョン PHP 5.3.3
DBバージョン MySQL 5.0.95

エラーログは下記になります。

Fatal error(E_USER_ERROR): DB処理でエラーが発生しました。
SQL: [SELECT * FROM dtb_order, ( SELECT MIN(shipping_id) AS shipping_id, order_id FROM dtb_shipping WHERE del_flg = 0 GROUP BY order_id ) T2 LEFT JOIN dtb_shipping ON T2.shipping_id = dtb_shipping.shipping_id AND T2.order_id = dtb_shipping.order_id WHERE dtb_order.del_flg = 0 AND create_date >= ? AND create_date <= ? AND dtb_order.order_id = T2.order_id ORDER BY dtb_order.update_date DESC ]
MDB2 Error: unknown error
_doQuery: [Error message: Could not execute statement]
[Last executed query: PREPARE mdb2_statement_mysql_23ae3a83ef7b9500ee60e6812f991d94700d44e468 FROM 'SELECT * FROM dtb_order, ( SELECT MIN(shipping_id) AS shipping_id, order_id FROM dtb_shipping WHERE del_flg = 0 GROUP BY order_id ) T2 LEFT JOIN dtb_shipping ON T2.shipping_id = dtb_shipping.shipping_id AND T2.order_id = dtb_shipping.order_id WHERE dtb_order.del_flg = 0 AND create_date >= ? AND create_date <= ? AND dtb_order.order_id = T2.order_id ORDER BY dtb_order.update_date DESC LIMIT 0, 10']
[Native code: 1052]
[Native message: Column 'create_date' in where clause is ambiguous]
on [/●●/●●/●●/public_html/data/class/SC_Query.php(1008)] from
login_id = ●●(0)[avaoo7cjag573koavp7p7i5k35]
/●●/●●/●●/public_html/admin/order/index.php(34): LC_Page_Admin_Order_Ex->process
/●●/●●/●●/public_html/data/class_extends/page_extends/admin/order/LC_Page_Admin_Order_Ex.php(56): LC_Page_Admin_Order->process
/●●/●●/●●/public_html/data/class/pages/admin/order/LC_Page_Admin_Order.php(84): LC_Page_Admin_Order->action
/●●/●●/●●/public_html/data/class/pages/admin/order/LC_Page_Admin_Order.php(161): LC_Page_Admin_Order->findOrders
/●●/●●/●●/public_html/data/class/pages/admin/order/LC_Page_Admin_Order.php(472): SC_Query->select
/●●/●●/●●/public_html/data/class/SC_Query.php(167): SC_Query->getAll
/●●/●●/●●/public_html/data/class/SC_Query.php(279): SC_Query->prepare
/●●/●●/●●/public_html/data/class/SC_Query.php(949): SC_Query->error
/●●/●●/●●/public_html/data/class/SC_Query.php(1008): trigger_error