libswt-gtk-3-jni:i386 conflicts with libswt-gtk-3-jni:amd64

I am trying to install both the 32-bit and the 64-bit version of libswt-gtk-3-jni, but both packages seem to be conflicting.

$ sudo apt-get install libswt-gtk-3-jni:i386 libswt-gtk-3-jni:amd64
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libswt-gtk-3-jni : Conflicts: libswt-gtk-3-jni:i386 but 3.8.2-1ubuntu1 is to be installed
 libswt-gtk-3-jni:i386 : Conflicts: libswt-gtk-3-jni but 3.8.2-1ubuntu1 is to be installed
E: Unable to correct problems, you have held broken packages.

$ apt-cache policy libswt-gtk-3-jni
libswt-gtk-3-jni:
  Installed: 3.8.2-1ubuntu1
  Candidate: 3.8.2-1ubuntu1
  Version table:
 *** 3.8.2-1ubuntu1 0
        500 http://nl.archive.ubuntu.com/ubuntu/ raring/universe amd64 Packages
        100 /var/lib/dpkg/status
$ lsb_release -rd
Description: Ubuntu 13.04
Release: 13.04