package duplicity 0.7.06-2ubuntu2 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1

above package failed.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: duplicity 0.7.06-2ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
AptOrdering:
 duplicity: Remove
 librsync1: Remove
 python-lockfile: Remove
 variety: Configure
 NULL: ConfigurePending
Architecture: amd64
Date: Thu Sep 29 15:23:53 2016
ErrorMessage: subprocess installed pre-removal script returned error exit status 1
InstallationDate: Installed on 2016-08-25 (35 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: duplicity
Title: package duplicity 0.7.06-2ubuntu2 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)