duplicate error

[minkoko]

Hello all my bro
i found some error on my shopping cart order statement
this error is Query fail Duplicate entry '1179' for key 'PRIMARY'


and my code is

$memberId   = $_POST['memberid'];
                if ($orderId) {
                for ($i = 0; $i < $numItem; $i++) {
                $tdate = date("Y-m-d H:i:s");// current date
		$ddate = date('Y-m-d', strtotime("+4 month"));
                 $sql = "INSERT INTO tbl_order(orderid,item_id,item_price,orderdate,deldate,userid, item_qty,item_shipfees,item_discountprice,ototalprice,orderstatus)
			VALUES ($orderId, {$cartContent[$i]['item_id']},{$cartContent[$i]['cprice']},NOW(),$ddate,$memberId,{$cartContent[$i]['ctqty']},
			{$cartContent[$i]['item_shipfees']},{$cartContent[$i]['item_discountfees']},$hidtotalprice,1)";
                          
				$result = dbQuery($sql);
                               
                         }
                         echo "I found the errorError Line" . mysql_errno(); //error slove
                       
	                 // update product stock
			for ($i = 0; $i < $numItem; $i++) {
			$sql = "UPDATE tbl_item SET item_qty = item_qty - {$cartContent[$i]['ctqty']}
						WHERE item_id = {$cartContent[$i]['item_id']}";
				$result = dbQuery($sql);
			}


			// then remove the ordered items from cart
			for ($i = 0; $i < $numItem; $i++) {
				$sql = "DELETE FROM tbl_cart
				        WHERE cardid = {$cartContent[$i]['cardid']}";
				$result = dbQuery($sql);
			}
		}

Thanks for appreciate

[MarkR]

Order id in your target table is a primary key and must be unique, you must be trying to insert another row with a primary key which already exists.