@Lemonlime Means that it wasn't activated when you hit deactivate from the Vegas menu. If you try to re-register and that tells you that you are out of licenses, you need to do what @Reyfox said and at least find out what other devices are using the 2 available license slots.
Sometimes Magix lists the same machine twice. Seems to always do that if you upgrade from win10 to 11 without deactivating it on win10 first. Also if a machine crashed and needed a win reinstall or new hard drive. In which case you need to delete the ghost machines in your Magix account. Also does that if you have different Vegas versions running on the same machine... in which case it's better to deactivate them from the Vegas menu of the other version because they only give you a limited number of Magix account de-activations per month before blocking re-activations till the next month.