package fp-units-rtl-2.6.4 2.6.4+dfsg-4 failed to install/upgrade: trying to overwrite '/usr/lib/fpc/2.6.4/units/x86_64-linux/rtl/libpstdconvs.a', which is also in package fpc 2.6.4

[Jan Busk]

error report emerged on first update after installing fpc. fpc is running whitout any problems so I don't understand why this error message appeard.

ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: fp-units-rtl-2.6.4 2.6.4+dfsg-4
ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4
Uname: Linux 3.19.0-26-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.3
Architecture: amd64
Date: Thu Aug 27 01:31:38 2015
DuplicateSignature: package:fp-units-rtl-2.6.4:2.6.4+dfsg-4:trying to overwrite '/usr/lib/fpc/2.6.4/units/x86_64-linux/rtl/libpstdconvs.a', which is also in package fpc 2.6.4
ErrorMessage: trying to overwrite '/usr/lib/fpc/2.6.4/units/x86_64-linux/rtl/libpstdconvs.a', which is also in package fpc 2.6.4
InstallationDate: Installed on 2015-08-21 (5 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
RelatedPackageVersions:
 dpkg 1.17.25ubuntu1
 apt 1.0.9.7ubuntu4.1
SourcePackage: fpc
Title: package fp-units-rtl-2.6.4 2.6.4+dfsg-4 failed to install/upgrade: trying to overwrite '/usr/lib/fpc/2.6.4/units/x86_64-linux/rtl/libpstdconvs.a', which is also in package fpc 2.6.4
UpgradeStatus: No upgrade log present (probably fresh install)