[Bug 1888881] Re: calculating fails when upgrading from 18.04 to 20.04

[Torsten Franz]

*** This bug is a duplicate of bug 1887544 ***
    https://bugs.launchpad.net/bugs/1887544

** This bug has been marked a duplicate of bug 1887544
   can not upgrade from 18.04 to 20.04

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https://bugs.launchpad.net/bugs/1888881

Title:
  calculating fails when upgrading from 18.04 to 20.04

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

Bug description:
  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

   If none of this applies, then please report this bug using the
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If
  you want to investigate this yourself the log files in '/var/log/dist-
  upgrade' will contain details about the upgrade. Specifically, look at
  'main.log' and 'apt.log'.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.37
  ProcVersionSignature: Ubuntu 4.15.0-112.113-generic 4.15.18
  Uname: Linux 4.15.0-112-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.15
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Jul 24 17:09:29 2020
  InstallationDate: Installed on 2020-07-09 (14 days ago)
  InstallationMedia: Ubuntu 16.04.6 LTS "Xenial Xerus" - Release amd64 (20190227)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-07-24 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2020-07-24T15:50:47.394303

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