do-release-upgrade abort on 16.04

[whocarez]

2018-09-14 20:18:11,517 DEBUG need_server_mode(): run in 'desktop' mode, (because of key deps for 'ubuntu-desktop')
2018-09-14 20:18:13,441 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
2018-09-14 20:18:13,443 DEBUG abort called

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.25
ProcVersionSignature: Ubuntu 4.4.0-137.163-generic 4.4.144
Uname: Linux 4.4.0-137-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Wed Oct 3 21:27:20 2018
InstallationDate: Installed on 2014-10-10 (1454 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2018-10-03 (0 days ago)