How to allow the buyer to update the category name during PO creation (process requisitions) ?

Summary:

When the buyer is creating an Order (process requisition), the field category name (in the line level) is not updatable

Content (required):

Our requirement is to allow the buyer to update the category name before approving the order, is there a privilege or a profile option to set up in order to allow this modification

Version (include the version you are using, if applicable):

22B