Kicking Edit Sessions

Problem

There's an edit session, that you are not connected to, that you want to close.

Solution

Find the other session (probably listed to you in the warning when you enter the edit mode):

operator@router> show system users no-resolve 
operator  p1       172.26.24.43                     11:22AM     7 -cli (cli)

Force the other session to log out:

operator@router> request system logout terminal p1

Dealing with uncommitted changes is left as an exercise for the reader.

(Source)