Hello - I have a collection with an 'embed' field. I want to change the embedding model for the field from modelA to modelB. I have tried to drop the field and then add it back again with a different config by updating the collection in 2 separate calls. But the embedding does not change before I update the collection and after. What is the proper way to do this ? I know I can just add an embedding field with a different name but it feels like a space of perfectly good space to have a field there that I know I will never use...