The problem is that I can't found the process and still having the same message: "You already started you TeaSpeak server over teastart_autorestart.sh"
I tried with htop
0 5 * * * /home/USER_NAME/TEASPEAKSERVERFOLDERNAME/teaspeak_updater.sh -f -s
In my case, today TeaSpeak was restarted and there isn't any new update. Server wasn't rebooted.