修改了重复写入mdversion表的sql bug

application/default/controllers/AuthorController.php

@@ -3078,7 +3078,8 @@ class AuthorController extends Zend_Controller_Action
    	$sql="insert into mdversion (xml,ts_created,uuid,changelog,userid) 
    		select x.data,m.ts_created,?,?,? from metadata m left join xml x on m.id=x.id
    		left join mdversion v on m.uuid=v.uuid
-   		where m.uuid=? and v.changelog is null";
+   		where m.uuid=? and v.changelog is null
+		order by v.ts_created ASC LIMIT 1";
    	$sth=$this->db->prepare($sql);
    	try
    	{