Update Post Meta on Pro Forms not working

Hi, I have an ACF CPT with a custom radio field with 3 values (‘RSVP, ‘Attended’, and Cancelled’). I’ve setup my action for updating this radio field as seen on attached image, but it isn’t working (the value is not being replaced). Does this update post meta work with radio fields?

Your Meta Name is a dynamic data tag. This cannot work. Please recheck the documentation to see what those fields are expecting. In this case, the meta name expects just the meta name itself. With your current setup, you’re passing the value of the post meta.