[Bug 1803664]

[Brian Murray]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. The error that you are a reporting is a conflict between
packages from the official Ubuntu archive and packages from a PPA. To
resolve this situation please deactivate PPAs using the tool 'ppa-purge'
which is provided by the ppa-purge package. Then try performing the
release upgrade again. Thanks in advance!

** Tags added: ppa-conflict

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https://bugs.launchpad.net/bugs/1803664

Title:
  do-release-upgrade from xenial to beaver

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

Bug description:
  Previous time you suggested to remove all packages from repository ubuntu-toolchain-r/test
  Done.
  But still can not update to new rel.
  Can you suggest what is wrong in this time and suggest how I can determine error if new one occurs on next attempt to update.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-139.165-generic 4.4.160
  Uname: Linux 4.4.0-139-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: GNOME
  Date: Fri Nov 16 10:02:23 2018
  InstallationDate: Installed on 2016-05-24 (905 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-11-16 (0 days ago)

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