apt-get dist-upgrade : error

["Ariel M. Jolodovsky" <ariel@jolodovsky.com.ar>]

Hola, agregue las lineas de woody a mi sources.list (excepto la de
security) e hice un apt-get dist-upgrade -d pero me devolvio el
siguiente error

jolox:~# apt-get dist-upgrade -d
Reading Package Lists... Done
Building Dependency Tree... Done
Calculating Upgrade... Failed
Sorry, but the following packages have unmet dependencies:
  asclock-themes: Conflicts: wmaker (< 0.15.0) but 0.80.0-4 is to be
installed
                  Conflicts: afterstep (<= 1.4.5.3-1) but it is not
going to be installed
  cpio: Conflicts: cpio-mt but it is not installable
E: Error, pkgProblemResolver::Resolve generated breaks, this may be
caused by held packages.
jolox:~# 

A que se debe? y como puedo solucionarlo??

Desde ya muchas gracias.
JoloX

P.D: Si me actualizo a woody, puedo hacer un downgrade a potato??


-- 
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