package python-oneconf 0.3.7.14.04.1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1

[prashant rana]

for compiling marble android i changed my system default python version 2.3 to latest python version 3.x . after that i start facing this problem.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: python-oneconf 0.3.7.14.04.1
ProcVersionSignature: Ubuntu 3.16.0-62.82~14.04.1-generic 3.16.7-ckt23
Uname: Linux 3.16.0-62-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
Date: Fri Feb 26 19:53:12 2016
DuplicateSignature: package:python-oneconf:0.3.7.14.04.1:subprocess installed pre-removal script returned error exit status 1
ErrorMessage: subprocess installed pre-removal script returned error exit status 1
InstallationDate: Installed on 2016-01-30 (26 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.5
 apt 1.0.1ubuntu2.11
SourcePackage: oneconf
Title: package python-oneconf 0.3.7.14.04.1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)