License expiry soon - Will new license overwrite the previous or do i need to deauthorise first?

[SamJakson]

My license manager is running concurrent licenses that are expiring soon, I'm ready to update with new ones however I'm confused as to whether the old ones will be overwritten automatically or if I should deauthorise them before authorising the new ones? Any help would be much appreciated!

[RobertBorchert]

 I would contact Tech Support directly for a best answer. 

The only time I have had to worry is when we changed the way we access licenses.  

[RichardDaniels]

It would not hurt to return all your licenses then provision and load the new ones. Otherwise your old expired licenses may remain in your concurrent license pool for all to see (for ever 🙂