fix 增加商户回调

mec-biz/src/main/java/com/ym/mec/biz/service/impl/SubjectChangeServiceImpl.java

@@ -234,7 +234,8 @@ public class SubjectChangeServiceImpl extends BaseServiceImpl<Integer, SubjectCh
         BigDecimal goodsMargin = subjectChange.getChangeMusicalPrice().add(subjectChange.getChangeAccessoriesPrice())
                 .subtract(subjectChange.getOriginalMusicalPrice()).subtract(subjectChange.getOriginalAccessoriesPrice());
         subjectChange.setGoodsMargin(goodsMargin);
-        subjectChange.setOriginalKitGroupPurchaseType(studentOriginal.getOriginalKitGroupPurchaseType());
+        subjectChange.setOriginalKitGroupPurchaseType(
+                studentOriginal.getOriginalKitGroupPurchaseType() == null ? KitGroupPurchaseTypeEnum.OWNED : studentOriginal.getOriginalKitGroupPurchaseType());
         String goodsIds = "";
         if (subjectChange.getChangeMusical() != null) {
             goodsIds += subjectChange.getChangeMusical() + "";