SAP Knowledge Base Article - Public

3663874 - Unable to change Purchase Order document type when converting Purchase Requisition in SAP S/4HANA Cloud

Symptom

  • When converting a Purchase Requisition (PR) to a Purchase Order (PO) using the Process Purchase Requisition app, the document type of the PO cannot be changed.

  • The PO is created automatically in the background and a PO number is immediately assigned.

  • At this stage, only fields such as quantity or price can be changed. Header fields like PO document type cannot be modified.

Environment

SAP S/4HANA Cloud Public Edition

Reproducing the Issue

  1. Create a PR in the system using advanced fields (e.g., account assignment, additional delivery info).

  2. Open the Process Purchase Requisition app and convert the PR to a PO.

  3. The system creates the PO in the Create Purchase Order app.

  4. The PO document type is locked and cannot be modified, although net price and quantity remain editable.

Cause

  • This is standard system behavior.

  • When advanced fields are present in a PR, the system routes PO creation to the Create Purchase Order Advanced app.

  • In this app, header-level fields such as document type, company code, purchasing org, currency, vendor, and plant are fixed once the PO is generated.

  • Operational details like price, quantity, and delivery dates are still editable because they do not affect the overall PO control structure.

Resolution

To work with the correct document type, the following options are available:

    1. Manual PO creation referencing PR

      • Copy the PR number from Process Purchase Requisition.

      • Open the Create Purchase Order app manually.

      • Enter the PR number in the “Purchase Requisition” field.

      • Select the required PO document type before saving.

    2. Ensure correct document type at PR creation

      • Adjust MRP or requisitioning rules so that the correct document type is already determined during PR creation.

      • This avoids the need to change the document type later.

Keywords

purchase requisition, process purchase requisition app, custom type purchase order, sap s/4hana cloud public edition, error creating purchase requisition, error transferring purchase requisition, pr to po conversion, document type adjustment, manage purchase requisition, create purchase order app, sap procurement , KBA , MM-PUR-REQ-SOC-2CL , Fiori UI for Sourcing Purchase Requisitions (Public Cloud) , Problem

Product

SAP S/4HANA Cloud Public Edition all versions