Event sheet which contains multiple events EventID is PK.
RSVP sheet which contains multiple RSVP by users and point to EventID like FK.
Initially, the RSVP sheet is empty - of course. I created a button on Event screen that opens RSVP page. How can I record the related EventID when RSVP entry is created?
I don’t generate EventId. It is present in events sheet as a unique column. Since it is no something that makes sense to user, I don’t display it in event details page.