Cannot Add new License

I have a Quartus License that expired over a year ago installed on my computer. We purchased a new license and I am trying to install it. When I go to create a new license for my machine (FPGA-2) I get the following error:

　

A Quartus II SE Fixed already exists on FPGA-2. Only 1 Quartus II SE Fixed can be installed on the same computer.

　

How do I activate my new license?