Cannot upgrade from 16.10 to 17.04: "An unresolvable problem occurred while calculating the upgrade. "

[Emmanuel Sales]

Tried to run do-release-upgrade, after downloading packages it resulted in this:

Calculating the changes

Calculating the changes

Could not calculate 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
* Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

Restoring original system state

Aborting

Info:

- lsb_release -rd

Description: Ubuntu 16.10
Release: 16.10

- apt-cache policy ubuntu-release-upgrader-core
ubuntu-release-upgrader-core:
  Installed: 1:16.10.8
  Candidate: 1:16.10.10
  Version table:
     1:16.10.10 500
        500 http://ca.archive.ubuntu.com/ubuntu yakkety-updates/main amd64 Packages
        500 http://ca.archive.ubuntu.com/ubuntu yakkety-updates/main i386 Packages
 *** 1:16.10.8 100
        100 /var/lib/dpkg/status
     1:16.10.6 500
        500 http://ca.archive.ubuntu.com/ubuntu yakkety/main amd64 Packages
        500 http://ca.archive.ubuntu.com/ubuntu yakkety/main i386 Packages
        500 http://cz.archive.ubuntu.com/ubuntu yakkety/main amd64 Packages
        500 http://cz.archive.ubuntu.com/ubuntu yakkety/main i386 Packages

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubuntu-release-upgrader-core 1:16.10.8
ProcVersionSignature: Ubuntu 4.8.0-30.32-generic 4.8.6
Uname: Linux 4.8.0-30-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Wed Apr 19 19:25:55 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-02-22 (422 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to yakkety on 2017-04-20 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.