// Fix change currency on editing order

controllers/admin/AdminOrdersController.php

@@ -635,10 +635,11 @@ class AdminOrdersControllerCore extends AdminController
 						$payment->update();
 					}
 					
-					$order_carrier = Db::getInstance()->executeS('
+					$order_carrier = Db::getInstance()->getRow('
 						SELECT *
 						FROM `'._DB_PREFIX_.'order_carrier`
 						WHERE `id_order` = '.(int)$order->id);
+					
 					// Update order carrier amount					
 					Db::getInstance()->execute('
 						UPDATE `'._DB_PREFIX_.'order_carrier`