Deactivated license on `TestServer`, now I cannot reactivate that license anywhere (even TestServer)

My company is trying to figure out how licensing works for TC. We have two licenses, and somehow both seem to be associated with my `TestServer` machine.

I looked under Help>Activate/Deactivate licenses and saw that `TestServer` had one license but with "2 seats". Thinking that I found the problem I clicked "deactivate license".

Now, I cannot get back onto TC on `TestServer` because the license expired, yet when I try to activate either license on this machine, I get an error saying something like "This license is already being used by `TestServer`".

What do I do?