Comment 13 for bug 1821251

This may be patched upstream, but it is not present in the version which today installs on Focal 20.04 (reported as 1:2.27ubuntu1).

One reason might be that https://code.launchpad.net/~vcs-imports/debmirror/trunk (which is about this package, right?) reports that "Last successful import was on 2014-11-07. "

Possibly this is caused by the fact that the upstream repo has moved from git://git.debian.org/collab-maint/debmirror.git (listed on that page) to https://salsa.debian.org/debian/debmirror as shown in comment #6.

Another reason why Focal cannot mirror itself successfully is reported in this bug: https://bugs.launchpad.net/ubuntu/+source/debmirror/+bug/1879348