Thank you for your reply.
When trying dist-upgrade, I get the following errors:
dpkg: error processing
/var/cache/apt/archives/trisquel-desktop-common-data_6.0-6_all.deb
(--unpack):
trying to overwrite '/etc/xdg/autostart/xscreensaver.desktop', which is also
in package xfce4-session 4.10.1-0ubuntu1~ppa0.12.04.1
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Removing 'diversion of /usr/bin/gnome-panel to /usr/bin/gnome-panel.real by
trisquel-desktop-common-data'
dpkg-divert: error: rename involves overwriting `/usr/bin/gnome-panel' with
different file `/usr/bin/gnome-panel.real', not allowed
dpkg: error while cleaning up:
subprocess new post-removal script returned error exit status 2
Errors were encountered while processing:
/var/cache/apt/archives/trisquel-desktop-common-data_6.0-6_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
Currently my version number is 6.0-5.1, wanting to upgrade to 6.0-6. How
should I change it?