Comment 7 for bug 1429614

I see on my utopic the package seems to be conflicting correctly (I mean the official one).

Trying to install the debian one forces the removal.

Why the dpkg log shows it if it is installed without the deb file?
https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1386328
https://launchpadlibrarian.net/188437330/VirtualBox.DpkgList.txt

this is obscure to me.