Same ID after trying to change.

Hello, 

By request of a customer we needed to change the teamviewer ID. This was succesfull on the first system. However after changing the second system it got the same teamviewer ID as the first one. Now we can't get the first ID to change to something usefull.

The first system won't change it's ID to something usefull, it's the same as the 2nd system but doesn't function even though i was connected and set new passwords.

Already tried uninstalling Teamviewer and 'remove settings - checked' but doesn't change the ID. Please advice.

Why isn't this supported by Teamviewer. Loads of people are having issues or wanting to change the ID's of systems.