First, you can check what systems are activated under your license. Refer to this link for detailed steps.
After that, go through this MATLAB answer. Although you have only one system, you might be getting this error 1.616 because of other reasons -
- If you tried activating a desktop installation of MATLAB with an online-only license.
- If you are still receiving error 353 or 1616 but do not see any activations listed in the License Center, this may mean that your administrator performed the activations and the admin will need to deactivate them.
