I donot have problems in Standard Sales order when I create billing doc via VF01. When I try to create another billing doc in VF01 for the same delivery it says error, as the item is already invoiced.
This is correct.
But while creating invoice for STO order, system allows me to create more than 1 billing document for the same delivery. If we accidentally or purposefully create it allows to create many.
Could you let me know where in SPRO (IMG) I can control this?