session expired

[zdravko]

I can only pretend to be myself. Any other user ends up with flash message:
Your session has expired. Please login again.
and login screen.
Log says:

Zdravko Balorda is pretend as Andrej Horvat
Redirected to http://localhost:3000/users/208
Completed 302 Found in 18ms (ActiveRecord: 12.4ms)
....
Filter chain halted as :session_expiration rendered or redirected
Completed 302 Found in 11ms (ActiveRecord: 6.2ms)

Redmine version 3.2.1.stable.90
Ruby version 2.0.0-p598 (2014-11-13) [x86_64-linux]
Rails version 4.2.5.2
Environment development
Database adapter PostgreSQL