two user with the same surname -> internal error??

[Sven Gehr]

Hi at all,

I try on a fresh kolab3-installation (on centos) to add two Users:

- Philipp Schneider
- Hans-Ulrich Schneider

an become a internal error when I try to add the second "schneider". I see the 
the system will gererate the same UID (schneider) but I can't edit the uid.

What can I do?

-- 
Viele Grüsse

Sven Gehr