package sudo 1.8.9p5-1ubuntu1.1 failed to install/upgrade: le sous-processus script pre-removal installé a retourné une erreur de sortie d'état 1

dont know

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: sudo 1.8.9p5-1ubuntu1.1
ProcVersionSignature: Ubuntu 3.19.0-26.28~14.04.1-generic 3.19.8-ckt4
Uname: Linux 3.19.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.12
Architecture: amd64
Date: Sat Sep 5 17:53:14 2015
DuplicateSignature: package:sudo:1.8.9p5-1ubuntu1.1:le sous-processus script pre-removal installé a retourné une erreur de sortie d'état 1
ErrorMessage: le sous-processus script pre-removal installé a retourné une erreur de sortie d'état 1
InstallationDate: Installed on 2015-09-04 (1 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.4
 apt 1.0.1ubuntu2.10
SourcePackage: sudo
Title: package sudo 1.8.9p5-1ubuntu1.1 failed to install/upgrade: le sous-processus script pre-removal installé a retourné une erreur de sortie d'état 1
UpgradeStatus: No upgrade log present (probably fresh install)
VisudoCheck:
 /etc/sudoers: parsed OK
 /etc/sudoers.d/README: parsed OK