Message type: E = Error
Message class: FKKEXC - Message Class for External Payments
Message number: 604
Message text: External ID of payment &1 already exists
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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
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FKKEXC603
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