CUPSys and libcupsys2 package conflict

System is gutsy , after upgrading from feisty

Preparing to replace cupsys 1.3.2-1ubuntu1 (using .../cupsys_1.3.2-1ubuntu4_i386.deb) ...
Ignoring nonregistered document cupsys
 * Stopping Common Unix Printing System: cupsd [ OK ]
Unpacking replacement cupsys ...
dpkg: error processing /var/cache/apt/archives/cupsys_1.3.2-1ubuntu4_i386.deb (--unpack):
 trying to overwrite `/usr/share/doc/libcupsys2/CREDITS.txt', which is also in package libcupsys2
dpkg-deb: subprocess paste killed by signal (Broken pipe)
 * Starting Common Unix Printing System: cupsd [ OK ]
Errors were encountered while processing:
 /var/cache/apt/archives/cupsys_1.3.2-1ubuntu4_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install. Trying to recover:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initialising package states... Done
Building tag database... Done
root@virgon:~#