Hey! I’m planning a series of events that we run every year. When booking their place, guests can choose one activity in the morning and one in the afternoon. Last year, despite trying to make instruction clear as possible, we had a large number of guests book the same session in the morning and afternoon. As both sessions were the same and we were limited for numbers, we then needed to contact the guests to clarify which session they wanted to join. All in all, it ended up a time consuming and messy process. Any tips for how we can mitigate this in future? I’ve struggled to find conditional formatting that prevents this. Any ideas welcome!