Field status settings and field selection in DBM Order

Hi,

I would like to make a specific field mandatory in the DBM Order. The field is "Supplying Plant" which can be found in transaction /dbm/order03 under the "Parts" tab in the section "Procurement Proposal"

Appreciate if anyone has any ideas about how this can be done? If there's a config setting via SPRO that would be great else I suppose we would have to use an exit. I would like to avoid the latter.

Thanks,

Sikandar