[Bug 1956039] Re: BADSIG 871920D1991BC93C Ubuntu Archive Automatic Signing Key (2018) <ftpmaster at ubuntu.com>

[Alex Lane]

What fixed it for me was to remove my apt-cacher-ng container + cache,
then re-add it.

This resolved the issue on multiple servers.

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Title:
  BADSIG 871920D1991BC93C Ubuntu Archive Automatic Signing Key (2018)
  <ftpmaster at ubuntu.com>

Status in apt package in Ubuntu:
  Confirmed

Bug description:
  Updating Jammy fails with:

  Get:2 http://archive.ubuntu.com/ubuntu jammy InRelease [270 kB]     
  Err:2 http://archive.ubuntu.com/ubuntu jammy InRelease
    The following signatures were invalid: BADSIG 871920D1991BC93C Ubuntu Archive Automatic Signing Key (2018) <ftpmaster at ubuntu.com>

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