Changed RaspberryPI board
I was running teamviewer on a remote Raspberry-PI.
I had to change the board and inserted the original SD card into the new board.
Now TeamViewer does not work anymore.
So I think TeamViewer is using the MAC address of the card as an identification maybe?
How can I over come this problem? I have to drive more than 400 Kilometers if I have to re0install TeamViewer in that remote PI.