How To Fix FKKEXC604 - External ID of payment &1 already exists

FKKEXC604 - Overview

• Message type: E = Error

• Message class: FKKEXC - Message Class for External Payments

• Message number: 604

• Message text: External ID of payment &1 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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message FKKEXC604 - External ID of payment &1 already exists ?

  The SAP error message FKKEXC604 indicates that there is a conflict with an external ID for a payment that you are trying to process. Specifically, it means that the external ID you are attempting to use for a payment already exists in the system. This can happen in various scenarios, such as when processing incoming payments, creating invoices, or handling financial transactions.
  
  Cause:
  
  Duplicate External ID: The external ID you are trying to use has already been assigned to another payment or transaction in the system.
  Data Entry Error: There may have been a mistake in entering the external ID, leading to a conflict with an existing record.
  Integration Issues: If you are integrating with external systems (like payment gateways), the same external ID might be sent multiple times.
  
  
  Solution:
  
  Check Existing Records: Look up the external ID in the system to see which payment or transaction it is associated with. You can do this by