Override update profile.Purch.requisition statiscal between fund reser&po

Dear all,

We are using update profile 101 and our current chain flow is:

funds reservation

purchase order

invoice

payment

we would like to include in our flow purchase requisition but as statistical budget update. As I understood, in help it is said that it is not possible in the middle of the chain make statistical updates. In fact although it is marked as statistical value type when at the account assignment of the purchase requisition I include the funds reservation if afterwards I display the consumption of the funds reservations it consumes. Any idea if there is a way for having in the chain the purchase requisition as statistical.

funds reservation

purchase requisition

purchase order

invoice

payment

Best regards and thanks for the help.