package zlib1g:amd64 1:1.2.8.dfsg-2ubuntu5.1 failed to install/upgrade: package zlib1g:amd64 is already installed and configured

[Yaron Lapidot]

Ubuntu won't fully upgrade

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: zlib1g:amd64 1:1.2.8.dfsg-2ubuntu5.1
ProcVersionSignature: Ubuntu 4.4.0-83.106-generic 4.4.70
Uname: Linux 4.4.0-83-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.6
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
Date: Fri Jul 7 11:48:11 2017
Dependencies:
 gcc-6-base 6.2.0-5ubuntu12
 libc6 2.24-3ubuntu2.2
 libgcc1 1:6.2.0-5ubuntu12
ErrorMessage: package zlib1g:amd64 is already installed and configured
InstallationDate: Installed on 2015-12-22 (563 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
RelatedPackageVersions:
 dpkg 1.18.10ubuntu1.1
 apt 1.2.20
SourcePackage: zlib
Title: package zlib1g:amd64 1:1.2.8.dfsg-2ubuntu5.1 failed to install/upgrade: package zlib1g:amd64 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)

[dino99 (9d9)]

This is an unsupported release now. Please think to install the next LTS 'Bionic 18.04'

http://cdimage.ubuntu.com/lubuntu-next/daily-live/current/
https://www.omgubuntu.co.uk/2018/02/ubuntu-18-04-minimal-install-option