I can't unbridge from phpbb2 or it's OK?

[SketcherCMS]

Sorry, I've read all manuals and this forum but I can't find a solution.
I use phpbb 2.0.18 and Coppermine Photo Gallery 1.4.10
They work as bridged very well.
But now I'm trying to update my forum to phpbb 3.0.2
First I have to unbridge CPG from old forum, right?
I've tried to do it with bridging manager and it said that CPG unbridged successful
But! If I login in the forum then I will be logged in CPG, why?
I still can login via forum with admin's rights, it is OK?
Can I just upgrade a forum now?

Thanks!

[Joachim Müller]

When requesting bridge support - mandatory!