package base-files 9.6ubuntu5 failed to install/upgrade: package base-files is already installed and configured

[bill.zhang]

can't use dpkg to install software.

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: base-files 9.6ubuntu5
ProcVersionSignature: Ubuntu 4.8.0-59.64-generic 4.8.17
Uname: Linux 4.8.0-59-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.7
AptdaemonVersion: 1.1.1+bzr982-0ubuntu17
Architecture: amd64
Date: Fri Aug 18 14:12:08 2017
Dependencies:

ErrorMessage: package base-files is already installed and configured
InstallationDate: Installed on 2017-03-26 (145 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
RelatedPackageVersions:
 dpkg 1.18.10ubuntu2
 apt 1.4
SourcePackage: dpkg
Title: package base-files 9.6ubuntu5 failed to install/upgrade: package base-files is already installed and configured
UpgradeStatus: Upgraded to yakkety on 2017-08-18 (0 days ago)