Let's say I've got an exmaple application, and in this application
there are a few wizards. User goes to one of the wizards, inputs data
in form in step 1, then goes to step 2. Data from step 1 was saved in
session.  Now user should do somehting in step 2 and go to step 3, but
he dosen't do that. He clicks "back" button in his browser, or maybe
he types url in address bar and goes to place in the system outside
the wizard.

The problem is those data in session. It wasn't removed and it still
there. User could go to another wizard and do the same thing and new
unnecessary data appear in session.

How you handle situations like that?

--
Raph
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