fix bug

src/main/java/com/mobvista/apptag/service/impl/TreeTagServiceImpl.java

@@ -102,8 +102,12 @@ public class TreeTagServiceImpl implements TreeTagService {
     }
 
     private TreeTag update(TreeTag oldTreeTag, String packageName) {
-        TreeTag treeTag = oldTreeTag;
+        TreeTag treeTag = new TreeTag();
         treeTag.setPackageName(packageName);
+        treeTag.setFirstTag(oldTreeTag.getFirstTag());
+        treeTag.setSecondTag(oldTreeTag.getSecondTag());
+        treeTag.setThirdTag(oldTreeTag.getThirdTag());
+        treeTag.setPlatform(oldTreeTag.getPlatform());
         return treeTag;
     }