how to downscale machines with volumes

Hi all!
I have a Strapi app working great, but somehow I have 2 machines running , each with a 40G volume attached. This is getting expensive, how do I downscale while keeping my app running and prefereably not having to rebuild the db? A 3g volume for the postgres db will be fine

Unfortunately, you cannot downscale Fly volumes, only upscale it: Increase disk capacity on VM - #2 by ignoramous

You’d have to create a new Machine with (3gb?) volume.

Ok thanks, will rebuild from scratch again