4.0 to 4.1 some question

4.0已跟以下升4.1 "

1.        上传全部 Discuz! 4.1.0 档到服务器覆盖原 4.0.0。
2.        修改 config.inc.php 文件，重新设置数据库账号信息
3.        上传 ./utilities/upgrade6.php 到论坛程序根目录下，运行之
4.        按照操作提示，直至全部升级完毕（默认情况下无需人工干预）
可是出现以下问题= ="
Discuz! info: MySQL Query Error

Time: 2006-6-1 5:37pm
Script: /discuz4.1/upgrade6.php

SQL: ALTER TABLE cdb_announcements ADD INDEX timespan (starttime, endtime)
Error: Duplicate key name 'timespan'
Errno.: 1061

An error report has been dispatched to our administrator

而且连回复都不行= ="
Discuz! info: MySQL Query Error

User: 新界牛
Time: 2006-6-2 7:32pm
Script: /discuz/post.php

SQL: SELECT email FROM cdb_subscriptions WHERE uid<>'1' AND tid='1518' AND lastnotify<'1149161556'
Error: Unknown column 'email' in 'field list'
程序文件跟数据库有冲突，请使用正确的程序文件上传上去覆盖

Similar error report has beed dispatched to administrator before.

查下~