- Log in to your control panel at https://wepwawet.net/panel and select your server.
- Stop your server and delete all your world folders. (world, world_nether & world_the_end),
- Go to "file manager" and open the server.properties file.
- Go to the line that says level-seed={insert your seed here} and change it to the seed you wish to use.
- Start the server.
There you go your server now has a new world with your new custom seed.