I have a sheet that will have data that changes, in this case locker assignments.
I want to create a form for people to assign themselves to an empty locker, by providing them with a dropdown list of available lockers, and include if they're top or bottom lockers through logic. I don't want the people to have access directly to the sheet where they could accidentally remove existing assignments.
The sheet includes all locker assignments, and is organized by locker number. I don't want people to simply add rows through a form. I've attached a screenshot of a portion of the sheet, with names blocked for privacy.