both fedora-release for f11 and f12 installed after upgrade ????

[Gianluca Cecchi <gianluca cecchi gmail com>]

Hello,
after upgrading to F12 with pains (see
https://www.redhat.com/archives/fedora-test-list/2009-November/msg00802.html)
I now have this on my system:
[root@ ~]# rpm -qa|grep fedora-release
fedora-release-notes-12.0.2-1.fc12.noarch
fedora-release-12-2.noarch
fedora-release-11-1.noarch

[root@ ~]# rpm -qf /etc/fedora-release
fedora-release-11-1.noarch
fedora-release-12-2.noarch

and package-cleanup --orphans gives almost all the f12 packages
installed..... (1316)

so probably something to fix due to the manual steps....
What should I do? remove the fedora-release-11-1.noarch rpm?

Thanks in advance,
Gianluca