Problem upgrading system

["Alexander Derenbach" <aderenbach@kinggrass.net>]

Hi, 

I just tried to upgrade my system with apt-get upgrade. An I get the
following output:

Preparing to replace passwd 1:4.0.3-30.4 (using
.../passwd_1%3a4.0.3-31sarge9_i386.deb) ...
Unpacking replacement passwd ...
dpkg: error processing
/var/cache/apt/archives/passwd_1%3a4.0.3-31sarge9_i386.deb (--unpack):
 trying to overwrite `/usr/sbin/add-shell', which is also in package
debianutils
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/passwd_1%3a4.0.3-31sarge9_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

I'm using: 

deb ftp://ftp.de.debian.org/debian/ stable main
deb http://security.debian.org/ stable/updates main

Thx for help