WTH, Have multiple energy sources to run in parallel

I have been using a cloud OVO integration for for my total consumed energy (gas and electric) , I now have a CAD and want this to take over, but if I use both it adds them together, I would like to use both or keep my OVO history until my CAD started and then have that take over.

This is related to this topic: https://community.home-assistant.io/t/wth-do-i-lose-lose-long-term-energy-data-if-i-delete-an-entity/468752/26