I am creating a database to track occurrences of incidents on buses based on an existing system. Currently the drivers can set a default bus number, which is used to pre-populate the bus number on the incident form. Where they can change that then, if they are driving another bus. This is a selection made by the driver. Not a bus assigned to them, per say. I was going to put this field in the staff table, not the bus table. However, someone said I should not, that I should put it in the bus table. I guess it would technically work either way, but I don't feel like the field belongs to the bus - it belongs to the staff member. Am I overthinking this?