Index: lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/service/ForumService.java
===================================================================
diff -u -r6cb7e57626b862ec93d3f643606133a5731f6e73 -rbe6aeaa61647f690cc832be9174f30036ebe8e0e
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/service/ForumService.java	(.../ForumService.java)	(revision 6cb7e57626b862ec93d3f643606133a5731f6e73)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/service/ForumService.java	(.../ForumService.java)	(revision be6aeaa61647f690cc832be9174f30036ebe8e0e)
@@ -611,11 +611,13 @@
  		//set ResourceToolContentHandler as null to avoid copy file node in repository again.
  		toolContentObj = Forum.newInstance(toolContentObj,toolContentId,null);
  		toolContentObj.setToolContentHandler(null);
+ 		toolContentObj.setCreatedBy(null);
  		Set<Message> items = toolContentObj.getMessages();
  		Set<Message> authorItems = new HashSet<Message>();
 		for(Message item:items){
 			if(item.getIsAuthored()){
 				authorItems.add(item);
+				item.setCreatedBy(null);
 				item.setToolSession(null);
 				item.setForum(null);
 				item.setToolContentHandler(null);