加入samba域的问题

偶在redhat7.1下把samba-2.0.7配成PDC可是win2k professional加入时提示：
  
  提供的数据与已存在的数据集冲突！
  
升级成samba-2.2.1还是这个问题，这是什么意思呀？
  
smb.conf如下：
  
[global]
   workgroup = DOMAN
   server string = Samba Server %L
   netbios name = server1
   log file = /var/log/samba/%m.log
   max log size = 10
   password level = 8
   username level = 8
   ssl CA certFile = /usr/share/ssl/certs/ca-bundle.crt
   username map = /etc/samba/smbusers

   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
   security = user
   encrypt passwords = yes
   smb passwd file = /etc/samba/smbpasswd
   local master = yes
   domain master = yes
   domain logons = yes
   dns proxy = no
[home]
;  ......