How To Fix 06405 - A purchase order for this requisition already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: 06 -

• Message number: 405

• Message text: A purchase order for this requisition already exists

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 06405 - A purchase order for this requisition already exists ?

  The SAP error message "06405 A purchase order for this requisition already exists" typically occurs when you attempt to create a purchase order (PO) for a requisition that has already been converted into a purchase order. This is a common scenario in procurement processes within SAP.
  Cause:
  
  Duplicate Purchase Order Creation: The requisition you are trying to convert into a purchase order has already been processed, and a purchase order has been created for it.
  Incorrect Requisition Reference: You may be referencing the wrong requisition number or have mistakenly tried to create a PO for a requisition that is already linked to another PO.
  System Configuration: In some cases, system settings or configurations may lead to this error if they are not set up to allow multiple POs for the same requisition.
  
  Solution:
  
  
  Check Existing Purchase Orders: 
  
  Go to the transaction code ME23N (Display Purchase Order) and check if a purchase order already exists for the requisition number you are trying to process.
  If a PO exists, you can either use that PO or create a new requisition if necessary.
  
  
  
  Review Requisition Status:
  
  Use transaction code ME53N (Display Purchase Requisition) to check the status of the requisition. Ensure that it is not already marked as converted to a PO.
  
  
  
  Create a New Requisition:
  
  If you need to order more items or make changes, consider creating a new purchase requisition instead of trying to convert the existing one.
  
  
  
  Consult with Procurement Team:
  
  If you believe there is an error or if you need to create multiple POs for the same requisition, consult with your procurement or purchasing team to understand the business rules and system configurations.
  
  
  
  System Configuration Review:
  
  If you have access to system configuration, check the settings related to purchase requisition and purchase order processing to ensure they align with your organization's policies.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  ME23N: Display Purchase Order
  ME53N: Display Purchase Requisition
  ME21N: Create Purchase Order (if you need to create a new one)
  
  
  
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message. Sometimes, specific patches or updates may address underlying issues.
  
  
  Documentation: Review SAP documentation or user manuals related to procurement processes for further guidance on handling purchase requisitions and orders.
  
  
  By following these steps, you should be able to resolve the error and proceed with your procurement activities in SAP.