Why does the session id keep changing?

[eluser]Pascal Kriete[/eluser]
How often it happens is dedicated by the 'sess_time_to_update' config value. The default is 300 seconds. Increasing that would work, but it's not a very safe practice.

Can you elaborate on the problem? What prevents you from setting your own persistent value?

Code:

$this->session->set_userdata('uid', $userid);