How to delete your main world on a Minecraft server?

So I'm on a server with multiple artificially created worlds. For example I created a void world for a spawnhub. But now I want to delete the default worlds. Nether, End and World. I can't delete those right now because they keep regenerating after a restart. I want to change the default world to the one with the void. People should also spawn there on initial join. Does anyone have any idea how to do this. I'm using MultiVerse.

Solution 1:

You don't necessarily have to delete the default worlds.

To change the world in which new players spawn by default, modify the value of the level-name property in server.properties to your desired world name.

If you still want to delete the originally generated world, you can do so with /mv delete which completely removes the world folders from your server or /mv remove which unloads the world but keeps the world folder after you have changed the server properties. Keep in mind that it is often dangerous to directly delete files and folders.