You should make sure to reduce the slots to 32 so that you don’t need to edit it via ServerQuery.
If you forget to do that, you should follow these steps:
If you wanna be 100% you don’t loose your server, you can make a Snapshot with a ServerQuery client for example with YaTQA or by opening a normal Telnet connection (via Putty etc.)
When the Server cannot read your license as it then is expired, it should automatically continue without it and you should be able to use it with just 32 Slots.