package digikam-doc (not installed) failed to install/upgrade: trying to overwrite '/usr/share/doc/kde/HTML/en/digikam/index.cache.bz2', which is also in package digikam-data 2:2.4.1-0ubuntu3

During installation of digikam-doc, it failed.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: digikam-doc (not installed)
ProcVersionSignature: Ubuntu 3.2.0-12.20-generic 3.2.2
Uname: Linux 3.2.0-12-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Mon Jan 30 17:29:41 2012
DuplicateSignature:
 Unpacking digikam-doc (from .../digikam-doc_1.2~svn1134171-1_all.deb) ...
 dpkg: error processing /var/cache/apt/archives/digikam-doc_1.2~svn1134171-1_all.deb (--unpack):
  trying to overwrite '/usr/share/doc/kde/HTML/en/digikam/index.cache.bz2', which is also in package digikam-data 2:2.4.1-0ubuntu3
ErrorMessage: trying to overwrite '/usr/share/doc/kde/HTML/en/digikam/index.cache.bz2', which is also in package digikam-data 2:2.4.1-0ubuntu3
SourcePackage: digikam-doc
Title: package digikam-doc (not installed) failed to install/upgrade: trying to overwrite '/usr/share/doc/kde/HTML/en/digikam/index.cache.bz2', which is also in package digikam-data 2:2.4.1-0ubuntu3
UpgradeStatus: Upgraded to precise on 2012-01-24 (5 days ago)