Preparing to unpack .../base-passwd_3.5.49ubuntu1_amd64.deb ...
Unpacking base-passwd (3.5.49ubuntu1) over (3.5.47) ...
Setting up base-passwd (3.5.49ubuntu1) ...
Changing home-directory of irc from /var/run/ircd to /run/ircd
1 changes have been made, rewriting files
Writing passwd-file to /etc/passwd
Writing shadow-file to /etc/shadow
Writing group-file to /etc/group
Error writing group-entry: Invalid argument
dpkg: error processing package base-passwd (--configure):
 installed base-passwd package post-installation script subprocess returned error exit status 4