First I mode a focus. Then I made another focus. When I try to edit the new one. It changes to the old one.

Are you able to provide steps to reproduce?

E.g.

1. Using Safari on Mac OS Big Sur
2. Create new focus tree
3. Create new focus, filling in title & description
4. Then create second focus, filling in title, description, and custom GFX
5. After pressing save, the second focus has the same data as the first

Yes, but I was using Microsoft Edge on Windows 10.