Changing Procurement Item Validation Org After Go live

Summary:

During initial deployment, Customer went live with just one Inventory Org and the same org was setup as the procurement Item validation Org in 'Configure Procurement Business Function'.

Now the customer has added another Inventory Org/Plant and the items specific to only 2nd Inv Org are also required to be assigned to the first Inv Org since it was already setup as the procurement item validation org.

So they want to change/update Procurement Item Validation Org (Inventory Organization in 'Configure Procurement Business Function') to either a newly created Item validation Org or with Item Master Org itself.