Change attribute value source of Helper Entities

Hi, I have several Helper to calculate the costs auf some sensors.

Now I have changed the Hardware sensor for Water and get the new Informations on a new entity.

How can I change the source Input for me calculate Helper?

I have tried in the Dev-Tools → States. But it Looks like, that Hass reset my changes after some time.

This is not a permanent change. It is only for making non permanent changes to entities for debugging automations and scripts. The changes revert as soon as the entity updates its state or an attribute value.

The only way to change the source of a Utility Meter helper created with the UI is to delete it and create a new one.

But then, all old history informations are also deleted.

Yes they are. No other way for a helper created with the UI, sorry.

Thank you. Now I create the entities in yaml, not with the Helper. There I can change the soruce later, if its needed.

Yeah, that’s the way to go.