sunyu::update::fix bug about monthcard add to cart

shopping-cart-application-service/src/main/java/cn/freemud/service/impl/mcoffee/ShoppingCartMCoffeeServiceImpl.java

@@ -180,9 +180,11 @@ public class ShoppingCartMCoffeeServiceImpl {
                     shoppingCartGoodsResponseVo.setChanged(true);
                     shoppingCartGoodsResponseVo.setToastMsg("该商品单次购买数量限制为10，请知晓");
                     // 返回购物车数据
-                    setAddAndUpdateResponse(shoppingCartGoodsResponseVo, oldCartGoodsList, null, ShoppingCartConstant.ADD_AND_UPDATE
+                    setAddAndUpdateResponse(shoppingCartGoodsResponseVo, oldCartGoodsList,
+                            ResponseResult.SHOPPING_CART_ADD_ERROR.getMessage(), ShoppingCartConstant.ADD_AND_UPDATE
                             , null);
                     return ResponseUtil.success(shoppingCartGoodsResponseVo);
+                    break;
                 }
             }
         }