[Bug 1907106] Re: Upgrade 18.04 to 20.04 fails

[Niels Duelund]

It seems, that the installer thinks I'm on 17.10, while this is really 18.04
This is seen in os-release:
cat /etc/os-release 
   NAME="Ubuntu"
   VERSION="18.04.5 LTS (Bionic Beaver)"
   ID=ubuntu
   ID_LIKE=debian
   PRETTY_NAME="Ubuntu 18.04.5 LTS"
   VERSION_ID="18.04"
   HOME_URL="https://www.ubuntu.com/"
   SUPPORT_URL="https://help.ubuntu.com/"
   BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
   PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
   VERSION_CODENAME=bionic
   UBUNTU_CODENAME=bionic

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https://bugs.launchpad.net/bugs/1907106

Title:
  Upgrade 18.04 to 20.04 fails

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Installation breaks.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.41
  ProcVersionSignature: Ubuntu 4.15.0-126.129-generic 4.15.18
  Uname: Linux 4.15.0-126-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.20
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: MATE
  Date: Mon Dec  7 15:01:51 2020
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2017-12-25 (1078 days ago)
  InstallationMedia: Ubuntu-MATE 17.10 "Artful Aardvark" - Release amd64 (20171018)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-12-07 (0 days ago)

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