Hi,
sadly there is currently no setting for that, have another booking form and some adjustments for that on my todo-list.
Probably the easiest way is to just save every data as an different booking, but that comes with some downsides. Or you could save it in the newfields column (where the newform data is stored.. that column will be migrated to a json format with one of the next versions), but that has some downsides too, you would need to adjust many things along with that too.
Kind regards,
Yves