package libfftw3-long3:amd64 3.3.4-2ubuntu1 failed to install/upgrade: package libfftw3-long3:amd64 is already installed and configured

[Jurgen Blick]

don't know

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: libfftw3-long3:amd64 3.3.4-2ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-36.41-lowlatency 4.2.8-ckt8
Uname: Linux 4.2.0-36-lowlatency x86_64
ApportVersion: 2.19.1-0ubuntu5
AptdaemonVersion: 1.1.1+bzr982-0ubuntu14
Architecture: amd64
Date: Sat Apr 30 20:55:46 2016
Dependencies:
 gcc-5-base 5.2.1-22ubuntu2
 libc6 2.21-0ubuntu4.2
 libgcc1 1:5.2.1-22ubuntu2
 libgomp1 5.2.1-22ubuntu2
 multiarch-support 2.21-0ubuntu4.2
DuplicateSignature: package:libfftw3-long3:amd64:3.3.4-2ubuntu1:package libfftw3-long3:amd64 is already installed and configured
ErrorMessage: package libfftw3-long3:amd64 is already installed and configured
InstallationDate: Installed on 2016-04-16 (15 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64 (20151021)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu2
SourcePackage: dpkg
Title: package libfftw3-long3:amd64 3.3.4-2ubuntu1 failed to install/upgrade: package libfftw3-long3:amd64 is already installed and configured
UpgradeStatus: No upgrade log present (probably fresh install)