package mono-runtime 3.2.8+dfsg-4ubuntu4 failed to install/upgrade: package is in a very bad inconsistent state; you should reinstall it before attempting configuration

i how this error on the screen but how and why i don't know. sorry.

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: mono-runtime 3.2.8+dfsg-4ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
Uname: Linux 4.2.0-19-generic i686
ApportVersion: 2.19.1-0ubuntu5
Architecture: i386
Date: Wed Dec 16 01:47:57 2015
DuplicateSignature: package:mono-runtime:3.2.8+dfsg-4ubuntu4: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 2015-12-13 (1 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release i386 (20151021)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu1
SourcePackage: mono
Title: package mono-runtime 3.2.8+dfsg-4ubuntu4 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)