package ppp 2.4.7-1+2ubuntu1 failed to install/upgrade: subprocess new pre-installation script returned error exit status 1

I upgraded from 14.04 to 16.04 and this problem occured

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: ppp 2.4.7-1+2ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Sun Apr 24 14:37:05 2016
DuplicateSignature:
 De-configuring network-manager (0.9.8.8-0ubuntu7.3) ...
 update-rc.d: /etc/init.d/pppd-dns exists during rc.d purge (use -f to force)
 dpkg: error processing archive /var/cache/apt/archives/ppp_2.4.7-1+2ubuntu1_amd64.deb (--unpack):
  subprocess new pre-installation script returned error exit status 1
ErrorMessage: subprocess new pre-installation script returned error exit status 1
InstallationDate: Installed on 2011-12-08 (1599 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10ubuntu1
SourcePackage: ppp
Title: package ppp 2.4.7-1+2ubuntu1 failed to install/upgrade: subprocess new pre-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)