package kvpnc 0.9.6a-2.1 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration

sun@sun-Inspiron-N5110:/usr/bin$ sudo aptitude purge kvpnc
下列软件包将被“删除”：
  kvpnc{p}
0 个软件包被升级，新安装 0 个， 1 个将被删除， 同时 1 个将不升级。
需要获取 0 B 的存档。 解包后将释放 2,868 kB。
您要继续吗？[Y/n/?] y
dpkg: 处理软件包 kvpnc (--purge)时出错：
 该软件包现在的状态极为不妥；
建议您在卸载它之前再重新安装一次
在处理时有错误发生：
 kvpnc
E: Sub-process /usr/bin/dpkg returned an error code (1)
软件包安装失败。正在试图恢复：

sun@sun-Inspiron-N5110:/usr/bin$

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: kvpnc 0.9.6a-2.1
ProcVersionSignature: Ubuntu 3.13.0-49.83-generic 3.13.11-ckt17
Uname: Linux 3.13.0-49-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
Date: Mon Apr 20 13:51:34 2015
DuplicateSignature: package:kvpnc:0.9.6a-2.1:package is in a very bad inconsistent state; you should reinstall it before attempting configuration
ErrorMessage: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
InstallationDate: Installed on 2014-07-27 (277 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: kvpnc
Title: package kvpnc 0.9.6a-2.1 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration
UpgradeStatus: No upgrade log present (probably fresh install)