Just get a snapshot of the server, delete it and then create a new one and restore the snapshot.Problem with license even after ip change. Changing the server id will help? Because ip is not on greylist.
How to change server id?
You mean ts3server.sqlitedb?
In the basic steps did you remove the serverkey.dat file?The server id is the same and the message has not disappeared
Cleaning the cache did not help