During install of git "runit" failed to configure.. package apt-config-auto-update (not installed) failed to install/upgrade: trying to overwrite '/etc/apt/apt.conf.d/10periodic', which is also in package update-notifier-common 3.168.7

During install of git "runit" failed to configure.. now during login/out or wm switch error appears, have purged "git" and am in the process of checking dependencies and apt-check etc....

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: apt-config-auto-update (not installed)
ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-36-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Sat Mar 3 16:40:21 2018
DuplicateSignature:
 package:apt-config-auto-update:(not installed)
 Unpacking apt-config-auto-update (2.0.0-1) ...
 dpkg: error processing archive /var/cache/apt/archives/apt-config-auto-update_2.0.0-1_all.deb (--unpack):
  trying to overwrite '/etc/apt/apt.conf.d/10periodic', which is also in package update-notifier-common 3.168.7
ErrorMessage: trying to overwrite '/etc/apt/apt.conf.d/10periodic', which is also in package update-notifier-common 3.168.7
InstallationDate: Installed on 2018-03-02 (0 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.3
 apt 1.2.25
SourcePackage: pk-update-icon
Title: package apt-config-auto-update (not installed) failed to install/upgrade: trying to overwrite '/etc/apt/apt.conf.d/10periodic', which is also in package update-notifier-common 3.168.7
UpgradeStatus: No upgrade log present (probably fresh install)