Video does not exists in sync_medialive_video command

[lunika]

Bug Report

Problematic Behavior

When the management command sync_medialive_video is executed, we have sometimes an error :

Video.DoesNotExist: Video matching query does not exist.
(3 additional frame(s) were not displayed)
...
  File "manage.py", line 12, in <module>
    execute_from_command_line(sys.argv)
  File "marsha/core/management/commands/sync_medialive_video.py", line 88, in handle
    live = Video.objects.get(pk=live_pk)

The video is deleted and does not exists anymore.

[kernicPanel]

Seems like it has been managed in #2284
Can we close this @polyhb @lunika ?