How To Fix IDFISK056 - Supplier document number &1 already exists for supplier &2

SAP Error Message - Details

• Message type: E = Error

• Message class: IDFISK -

• Message number: 056

• Message text: Supplier document number &1 already exists for supplier &2

What causes this issue?

You entered a supplier document number that has already been assigned to
another document. In a given fiscal year, a supplier cannot send more
than one document with the same document number.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Enter a valid supplier document number.

You can customize the type of this message in the <LS>Manage Your
Solution</> app, under <LS>Configure Your Solution -> Finance ->
Localization -> General Settings -> Change Message Control</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IDFISK056 - Supplier document number &1 already exists for supplier &2 ?

  The SAP error message IDFISK056 indicates that there is a duplicate supplier document number for a specific supplier. This error typically occurs when you attempt to create or update a supplier document (such as a purchase order, invoice, or other supplier-related documents) and the system detects that the document number you are trying to use already exists for the specified supplier.
  Cause:
  
  Duplicate Document Number: The most common cause is that the document number you are trying to use has already been assigned to another document for the same supplier.
  Incorrect Number Range: The number range configuration for supplier documents may not be set up correctly, leading to overlaps.
  Data Entry Error: There may have been a manual entry error where the same document number was entered for different transactions.
  System Migration Issues: If data was migrated from another system, there may be conflicts with existing document numbers.
  
  Solution:
  
  Check Existing Documents: Verify if the document number you are trying to use already exists for the supplier. You can do this by searching for the supplier documents in the relevant transaction (e.g., ME23N for purchase orders).
  Use a Unique Document Number: If the document number is indeed in use, you will need to generate a new, unique document number for the transaction.
  Review Number Range Configuration: Check the configuration of number ranges for supplier documents in the SAP system. Ensure that the number ranges are set up correctly and that there are no overlaps.
  Consult with IT or SAP Support: If you suspect that the issue is due to a system migration or configuration error, consult with your IT department or SAP support team for further assistance.
  Error Handling: Implement error handling in your processes to catch such issues early, ensuring that document numbers are checked for uniqueness before submission.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ME23N (Display Purchase Order), ME21N (Create Purchase Order), or MIRO (Invoice Verification) to manage supplier documents.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation regarding supplier management and document number handling for best practices.
  
  By following these steps, you should be able to resolve the IDFISK056 error and prevent it from occurring in the future.