Replaces a tracing document the caller's company uploaded with one of its uploaded files. The old document is removed and a new one — same type, same Order Hub order, named after the new file — is attached to the purchase order's link; the file is moved to the private bucket. 404 not_found (purchase order, document or link missing or removed), 403 insufficient_rights (another company's document), 400 document_type_not_valid (documentType differs from the document's type), 404 invalid_document_id (the file is not the caller's). The links' document figures are refreshed in the background.