[Bug 1826668] Re: upgrade to 19.04 studio FAILED!

[Brian Murray]

The message from the release upgrader should have mentioned using 'ppa-
purge' which will downgrade the packages you've installed from the PPA
to the official ones provided by the Ubuntu archive. 'add-apt-
repository' will just disable the PPA and not downgrade the packages.
Were you recommended to use ppa-purge?

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

** Summary changed:

- upgrade to 19.04 studio FAILED!
+ upgrade to 19.04 studio was not calculatable

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https://bugs.launchpad.net/bugs/1826668

Title:
  upgrade to 19.04 studio was not calculatable

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

Bug description:
  Just tried to upgrade 18.10 to 19.04.
   - first, it critisised, that there is a ppa, which may not be updated, 
       so I removed it via: "sudo apt-add-repository ppa:thierry-f/fork-michael-gruz"
   - second try said, that I should send this bug report...

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: ubuntu-release-upgrader-core 1:18.10.11.6
  ProcVersionSignature: Ubuntu 4.18.0-18.19-lowlatency 4.18.20
  Uname: Linux 4.18.0-18-lowlatency x86_64
  ApportVersion: 2.20.10-0ubuntu13.3
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Sat Apr 27 21:04:16 2019
  InstallationDate: Installed on 2018-10-07 (202 days ago)
  InstallationMedia: Ubuntu-Studio 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to cosmic on 2019-04-27 (0 days ago)
  VarLogDistupgradeTermlog:

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