edit

lib/Yspay.php

@@ -196,7 +196,7 @@ class Yspay extends Core
 						(
 							'totalAmount' => $request['platformAmount'],
 							'mid' => $mid,
-							'merOrderId' => $request['merOrderId'] . '_0',
+							'merOrderId' => $request['merOrderId'] . '_O',
 						);
 						$request['subOrders'][] = $subOrders;
 						$request['platformAmount'] = 0;