Regenerate a world

To regenerate a world you can use the /world regenerate <world> [<flags>] command.
This command will regenerate the specified world, so use it with caution.

Caution

Regenerating a world is irreversible. Make sure to back up any important data before proceeding.
The world's entire progress will be permanently deleted.

Flags

--confirm: This flag is required to confirm the regeneration of the world. It is a safety measure to prevent accidental regenerations.
--schedule: This flag schedules the regeneration of the world to the server shutdown process.
The regeneration of minecraft:overworld can only be scheduled as it is required to always exist during runtime.

To simply regenerate a world, you can use the following command:

/world regenerate worlds:my_world --confirm

To schedule the regeneration of a world, you can use:

/world regenerate minecraft:overworld --confirm --schedule