How To Fix WZRE_PRX502 - Invoice request &1 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: WZRE_PRX - SOA messages from proxy implementations

• Message number: 502

• Message text: Invoice request &1 already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WZRE_PRX502 - Invoice request &1 already exists ?

  The SAP error message:
  WZRE_PRX502 Invoice request &1 already exists
  typically occurs in the context of invoice processing, particularly when dealing with invoice requests in SAP's logistics or financial modules (such as MM - Materials Management or FI - Financial Accounting).
  
  Cause
  This error means that an invoice request with the identifier &1 (where &1 is replaced by the actual invoice request number) already exists in the system. The system is trying to create or post an invoice request that duplicates an existing one, which is not allowed.
  Common causes include:
  
  Attempting to create a duplicate invoice request for the same invoice or delivery.
  A previous invoice request was already created and not yet cleared or processed.
  Data inconsistencies or duplicate entries due to manual intervention or system errors.
  Integration issues where the same invoice data is sent multiple times from an external system.
  
  
  Solution
  To resolve this error, consider the following steps:
  
  
  Check Existing Invoice Requests:
  
  Use transaction codes like MRBR, MIRO, or relevant invoice request display transactions to find the existing invoice request with the given number.
  Verify the status of the existing invoice request (posted, parked, blocked, etc.).
  
  
  
  Avoid Duplicate Creation:
  
  If the invoice request already exists and is valid, do not create a new one.
  If you intended to update or reference the existing invoice request, use the appropriate transaction or process.
  
  
  
  Clear or Delete Incorrect Invoice Requests:
  
  If the existing invoice request is incorrect or a duplicate, consider reversing or deleting it if business processes allow.
  Use transaction MRRL or MRBR to release blocked invoices or correct errors.
  
  
  
  Check Integration Interfaces:
  
  If the invoice requests are created via interfaces (e.g., EDI, IDocs), check for duplicate messages or reprocessing issues.
  Ensure that the external system does not resend the same invoice request multiple times.
  
  
  
  Consult SAP Notes and Documentation:
  
  Search SAP Support Portal for notes related to message WZRE_PRX502 for any known bugs or patches.
  Review configuration settings related to invoice request number ranges and duplication checks.
  
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  MIRO - Enter Incoming Invoice
  MRBR - Release Blocked Invoices
  MRRL - Release Invoice Documents
  MRIS - Invoice Verification
  
  
  
  SAP Modules:
  
  MM (Materials Management)
  FI (Financial Accounting)
  SD (Sales and Distribution), if invoice requests are related to billing documents
  
  
  
  SAP Notes:
  
  Check SAP Notes for any updates or corrections related to invoice request duplication errors.
  
  
  
  User Roles:
  
  Ensure users have appropriate authorizations to view, create, or delete invoice requests.
  
  
  
  
  If you provide the exact transaction or process where this error occurs, I can give more tailored advice.