How To Fix WG307 - Purchase order not created for supplier &1 &2 as one already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: WG - Messages for store order and investment buy

• Message number: 307

• Message text: Purchase order not created for supplier &1 &2 as one already exists

What causes this issue?

A purchase order could not be created for the supplier as a purchase
order already exists.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WG307 - Purchase order not created for supplier &1 &2 as one already exists ?

  Certainly! Here's a detailed explanation for the SAP error message WG307:
  
  SAP Error Message: WG307
  Text: Purchase order not created for supplier &1 &2 as one already exists
  
  
  Cause:
  This error occurs when you attempt to create a purchase order (PO) for a supplier, but the system detects that a purchase order for the same supplier and the same purchasing document already exists. SAP prevents the creation of duplicate purchase orders for the same supplier and document combination to avoid redundancy and potential conflicts in procurement processing.
  In other words, the system is designed to avoid multiple purchase orders being created for the same supplier under the same conditions, which could lead to confusion or duplicate orders.
  
  Explanation of the placeholders:
  
  &1 = Supplier number (Vendor number)
  &2 = Purchase order number or purchasing document number that already exists
  
  
  Typical Scenarios Leading to This Error:
  
  Trying to create a new PO for a supplier when a PO for the same