Your bug report #25100: 'guix system reconfigure' fails when new generation already exists which was filed against the guix package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 25100@debbugs.gnu.org. -- 25100: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=25100 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems