[Bug 1722874] [NEW] Cannot upgrade from Xenial to Zesty

[alevan]

Public bug reported:

Cannot update from Xenial to Zesty. I get this error in terminal:

An unresolvable problem occurred while calculating the upgrade.

This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubuntu-release-upgrader-core 1:16.10.10
ProcVersionSignature: User Name 4.8.0-59.64-generic 4.8.17
Uname: Linux 4.8.0-59-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.7
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Wed Oct 11 20:59:47 2017
InstallationDate: Installed on 2016-09-17 (389 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to yakkety on 2017-10-11 (0 days ago)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: Invalid


** Tags: amd64 apport-bug dist-upgrade yakkety

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

** Summary changed:

- Cannot upgrade from Yakkety to Zesty
+ Cannot upgrade from Xenial to Zesty

** Description changed:

- Cannot update from Yakkety to Zesty. I get this error in terminal:
+ Cannot update from Xenial to Zesty. I get this error in terminal:
  
+ An unresolvable problem occurred while calculating the upgrade.
  
- An unresolvable problem occurred while calculating the upgrade. 
- 
- This can be caused by: 
- * Upgrading to a pre-release version of Ubuntu 
- * Running the current pre-release version of Ubuntu 
+ This can be caused by:
+ * Upgrading to a pre-release version of Ubuntu
+ * Running the current pre-release version of Ubuntu
  * Unofficial software packages not provided by Ubuntu
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: ubuntu-release-upgrader-core 1:16.10.10
  ProcVersionSignature: User Name 4.8.0-59.64-generic 4.8.17
  Uname: Linux 4.8.0-59-generic x86_64
  ApportVersion: 2.20.3-0ubuntu8.7
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Wed Oct 11 20:59:47 2017
  InstallationDate: Installed on 2016-09-17 (389 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to yakkety on 2017-10-11 (0 days ago)

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https://bugs.launchpad.net/bugs/1722874

Title:
  Cannot upgrade from Xenial to Zesty

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

Bug description:
  Cannot update from Xenial to Zesty. I get this error in terminal:

  An unresolvable problem occurred while calculating the upgrade.

  This can be caused by:
  * Upgrading to a pre-release version of Ubuntu
  * Running the current pre-release version of Ubuntu
  * Unofficial software packages not provided by Ubuntu

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: ubuntu-release-upgrader-core 1:16.10.10
  ProcVersionSignature: User Name 4.8.0-59.64-generic 4.8.17
  Uname: Linux 4.8.0-59-generic x86_64
  ApportVersion: 2.20.3-0ubuntu8.7
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Wed Oct 11 20:59:47 2017
  InstallationDate: Installed on 2016-09-17 (389 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to yakkety on 2017-10-11 (0 days ago)

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