systemupgrade wily to xenial: package libc6:i386 2.21-0ubuntu4.3 failed to install/upgrade: package libc6:i386 is already installed and configured

[Sven Jonetat]

i dont know

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libc6:i386 2.21-0ubuntu4.3
ProcVersionSignature: Ubuntu 4.2.0-37.43-generic 4.2.8-ckt10
Uname: Linux 4.2.0-37-generic i686
ApportVersion: 2.19.1-0ubuntu5
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: i386
CrashReports:
 640:0:114:911488:2016-05-30 21:50:58.026214838 +0200:2016-05-30 21:50:59.026214838 +0200:/var/crash/libc6.0.crash
 600:0:114:823669:2016-05-30 21:50:34.218015432 +0200:2016-05-30 21:50:35.218015432 +0200:/var/crash/libc6:i386.0.crash
 600:0:114:729719:2016-05-30 21:49:15.429346199 +0200:2016-05-30 21:49:15.389345863 +0200:/var/crash/cups.0.crash
 600:108:114:0:2016-05-30 21:51:02.062240168 +0200:2016-05-30 21:51:02.062240168 +0200:/var/crash/libc6.0.uploaded
 644:0:114:0:2016-05-30 21:50:59.462218405 +0200:2016-05-30 21:50:59.462218405 +0200:/var/crash/libc6.0.upload
Date: Mon May 30 21:50:35 2016
Dependencies:
 gcc-5-base 5.2.1-22ubuntu2
 libc6 2.21-0ubuntu4.3
 libgcc1 1:5.2.1-22ubuntu2
DuplicateSignature: package:libc6:i386:2.21-0ubuntu4.3:package libc6:i386 is already installed and configured
ErrorMessage: package libc6:i386 is already installed and configured
InstallationDate: Installed on 2014-02-20 (830 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release i386 (20131016)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu3
SourcePackage: dpkg
Title: package libc6:i386 2.21-0ubuntu4.3 failed to install/upgrade: package libc6:i386 is already installed and configured
UpgradeStatus: Upgraded to xenial on 2016-05-30 (0 days ago)