优惠券没保存

src/main/java/com/izouma/nineth/service/OrderService.java

@@ -241,6 +241,7 @@ public class OrderService {
                 } else {
                     order.setTotalPrice(BigDecimal.ZERO);
                 }
+                userCouponRepo.save(coupon);
             }
 
             if (collection.getSource() == CollectionSource.TRANSFER) {