How to prevent PO's getting the same description when created from a multi-line requisition

Summary:

When we have a requisition with multiple lines with different suppliers, the resulting PO's all have the same PO description from the requisition header description, or the first requisition line. This results in confusion for the buyers and need to manually correct the PO descriptions.

Customer says this is not an acceptable way of working. They want the requisition header description and resulting PO header descriptions to be blank.
How can we achieve this.

Content (please ensure you mask any confidential information):

When we have a requisition with multiple lines with different suppliers, the resulting PO's all have the same PO description from the requisition header description, or the first requisition line. This results in confusion for the buyers and need to manually correct the PO descriptions.