There are cases that you may want to deactivate the current license key. One reason is a change in the issued license key. When this happens, in order to activate the new license key, the user needs to deactivate the current license key first. The deactivation step is straightforward. In InDesign's top menu, Go to Cloudinary > Deactivate:
Once the current license is deactivated, the Activate link should be selectable and the user will be prompted with a window to enter the license key.