How To Fix FKKEXC062 - Grouping key &4 has already been posted

FKKEXC062 - Overview

• Message type: E = Error

• Message class: FKKEXC - Message Class for External Payments

• Message number: 062

• Message text: Grouping key &4 has already been posted

What causes this issue?

You have tried to post payment &v1& of branch/cash desk &v3&/&v4& using
grouping key &v4&.
However, grouping key &v4& has already been processed further and can no
longer be used.

System Response

Payment &v1& will not be received.

How to fix this error?

Send the payment using a valid grouping key.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

FKKEXC062 - Details

• The SAP error message FKKEXC062, which states "Grouping key &4 has already been posted," typically occurs in the context of the Contract Accounts Receivable and Payable (FI-CA) module. This error indicates that a grouping key (which is used to group multiple items for processing) has already been processed or posted in the system, and therefore cannot be posted again.
  
  Cause:
  
  Duplicate Posting: The grouping key you are trying to post has already been processed in a previous transaction.
  Incorrect Data Entry: There may be a mistake in the data entry where the same grouping key is being used multiple times.
  System Configuration: There might be a configuration issue in the system that allows for duplicate postings.
  
  
  Solution:
  
  Check Existing Postings: Review the postings related to the grouping key in question. You can do this by using transaction codes like FPL9 (Display Document) or FBL5N (Customer Line Item Display) to see if the grouping key has already