package gconf2 3.2.6-3ubuntu6 failed to install/upgrade: dependency problems - leaving triggers unprocessed

[Victor gonzalez]

This is the 2nd time I repro this bug, it's a dupe of:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1611256

Happened again upgrading from Xenial to Yakkety with $ update-manager -cd

Add info: 2 screenshots attached 1.png shows the gconf error, after this happens packages start failing one after another, finally in 2.png messages from the system tells that upgrading was cancelled and it will automatically do $ dpkg --configure -a

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: gconf2 3.2.6-3ubuntu6
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.3-0ubuntu5
Architecture: amd64
Date: Wed Aug 10 09:02:21 2016
ErrorMessage: dependency problems - leaving triggers unprocessed
InstallationDate: Installed on 2016-08-10 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Beta amd64 (20160806)
RelatedPackageVersions:
 dpkg 1.18.9ubuntu2
 apt 1.3~pre3
SourcePackage: gconf
Title: package gconf2 3.2.6-3ubuntu6 failed to install/upgrade: dependency problems - leaving triggers unprocessed
UpgradeStatus: Upgraded to yakkety on 2016-08-10 (0 days ago)

[Launchpad Janitor (janitor)]

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