Edit source of helper statistics

Is there a way (before trying to edit the raw helper files in config/.storage)
to edit the entity source of a statistics helper. The GUI do not let edit the source entity (in my case a moving average)…

These files are not supposed to be edited.
If UI does not allow you to edit smth - this is either a bug or done intentionally.
Probably the simplest way for you could be just deleting this entity and creating a new one, no?

Problem by recreating the helper is to be sure to have all dependencies, and also if another helper can not be edited himself…
Or do not edit the entity ID and keep a difference between entity ID and label.