Comment 12 for bug 1873545

This bug was fixed in the package ubuntu-release-upgrader - 1:20.10.3

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ubuntu-release-upgrader (1:20.10.3) groovy; urgency=medium

  [ Dimitri John Ledkov ]
  * Use ubuntu-archive-keyring to verify upgrades, irrespective of how
    apt-key is configured.

  [ Brian Murray ]
  * utils/demotions.py: also use the ubuntu-archive-keyring when determining
    packages that were demoted.

 -- Brian Murray <email address hidden> Tue, 30 Jun 2020 09:15:09 -0700