Hi, I am new to running minecraft servers, but I have some experience in running other servers.

I was playing on my freshly new server, I copy and pasted a world that we already had into the folder and called it world.

I left it overnight to run as my friends were playing on it, but when I came back to it, it had reset somehow all the configuration and the world. And stopped the server.

this might be a bug as I was following a turtorial and I might have an outdated version, but how do I update it then?

Thanks

Josh