How to clean up the world's goods and redundant accounts

Who can help with that? When I try to delete the world record in save, sphere will not work normally. How can I delete it without any problems?

all accounts are in sphereaccu.scp so you can clean this file and there' ll be no accounts at all.
To clean up the world you have to do it by your own hands in game or in the save file by deleting id's.

But my suggestion is, try new sphereworld and make it as you want by adding npc and items that you need in game.

you can create function, which removes all spawns and items