Used fedup . What happened?

[dave peters]

I attempted to upgrade from F19 to F20.  I used  a dvd of F20 (x64)  and
ran:

fedup   --device

All appeared to go as I would expect. However, uname now gives me:

Linux localhost.localdomain 3.12.5-200.fc19.x86_64 #1 SMP Tue Dec 17
22:21:14 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux.

What have I done?   What should I do next?   I can restore the previous F19
 (I hope)

Thanks
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