The newest update removed the ability to overwrite or update saved layouts. Now you can only save new layouts.

I use Descript to edit podcasts, and rely on the ability to overwrite existing layouts as small changes are needed based on the framing of guests which changes every episode. It would be incredibly inconvenient and wasteful to create brand new layouts and delete outdated versions each time I edit a new episode, but that is my only option with the new update.