Thanks for the response, Justin! I had the niggling feeling in the back of my mind that this was a flaw in the design, but frankly haven’t had the time to work through it. Basically, I have an email that is sent out via automation when a checkbox is checked. There are two different versions of the email that are deployed based on a single-select field (call it Group A and Group B). So the conditions of the automation are “when Checkbox is checked and when Group is A” (or B). My screw-up happened when I moved a few people between the two groups - the email went out again to those people. For my specific use-case, I don’t want that to happen. If there’s an obvious change I can make, I’d love to hear it!
@Anna Whenever I use a checkbox as part of an automation trigger, I design the automation to un-check the box at the end of the other actions. That should solve the problem you’re having. If you move people between groups with the box unchecked, nothing would happen. You’d need to check the box again to trigger another email delivery.
To clear any field as part of an “Update record” action, just add the field to the action, but don’t put anything in the field settings. This works for any field type, including checkboxes.