When users have multiple sessions, these are not displayed in the session administration in admin interface: only one session is displayed in the list.

This is due to the

$countGroup = 'GROUP BY ezsession.user_id';

in session.php

Patch is attached to solve this issue.

Steps to reproduce

Use eZ publish 4.4

Login multiple times with same user account
Check in Session administration in admin interface
Click on the multiple logged user: only one session is displayed in the list