修改入库数量的时候，征订项冲红

src/main/java/com/xjrsoft/module/textbook/service/impl/TextbookWarehouseRecordServiceImpl.java

@@ -287,7 +287,9 @@ public class TextbookWarehouseRecordServiceImpl extends MPJBaseServiceImpl<Textb
             TextbookSubscriptionItem updateTextbookSubscriptionItem = new TextbookSubscriptionItem();
             updateTextbookSubscriptionItem.setId(textbookSubscriptionItem.getId());
 
-            updateTextbookSubscriptionItem.setInStockNum(dto.getWarehouseNumber());
+            updateTextbookSubscriptionItem.setInStockNum(
+                    textbookSubscriptionItem.getInStockNum() - (textbookWarehouseRecord.getWarehouseNumber() - dto.getWarehouseNumber())
+            );
             updateTextbookSubscriptionItem.setModifyDate(new Date());
             textbookSubscriptionItemMapper.updateById(updateTextbookSubscriptionItem);
         }