How can I disable the beep sound when logging a set in the Strength activity on the Garmin Forerunner 955?

I have a Forerunner 955 and every time I press the button to mark a set during the Strength activity, the watch plays a beep. I want to turn this sound off. I found Settings → System, but I can’t figure out which setting disables the beep specifically for the Strength activity.

Which option do I need to change to stop the watch from making this sound?