Screen's ID and agent must be unique for module - when I try to save my Web screen

I’m editing a screen that I’ve been working on for a while. I’m getting the following error when I click “OK” or “Apply”:
Screen’s ID and agent must be unique for module. Id=rade$batchEntry; agent=null; module=web
What is going wrong? How do I save all the changes I just made?

Studio 6.4.2

EDIT - a little research shows this is a known bug. I would like to keep all of my changes I just made. Any suggestions on how to preserve my edits?

Hi, Eric.

We have already fixed this problem. Please, upgrade Studio to 6.4.3 version.

Thank you.