How To Fix FKKEXC111 - &1 is an agent with G/L account posting; correct your entry

FKKEXC111 - Overview

• Message type: E = Error

• Message class: FKKEXC - Message Class for External Payments

• Message number: 111

• Message text: &1 is an agent with G/L account posting; correct your entry

What causes this issue?

Branch &V1& is an <DS:DE.XEXTC_KK>agent with G/L account posting</>.
That means that reconciliation (cash desk closing) takes place using a
G/L account posting.

System Response

The system rejects the entry.

How to fix this error?

Correct your entry. Do not enter a business partner, or choose a branch
that is assigned to an <DS:GLOS.446073555C85004CE10000000A155435>agent
with agent posting</>, or both.

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.

FKKEXC111 - Details

• The SAP error message FKKEXC111 typically occurs in the context of the Contract Accounts Receivable and Payable (FI-CA) module when there is an issue with the posting of an agent that is associated with a General Ledger (G/L) account. This error indicates that the entry you are trying to post is not valid because the agent you are using is linked to a G/L account posting, which may not be appropriate for the transaction you are attempting to execute.
  
  Cause:
  
  Incorrect Agent Assignment: The agent you are trying to use is configured in a way that it requires a G/L account posting, but the transaction does not support this.
  
  Configuration Issues: There may be a misconfiguration in the settings for the agent or the G/L account that is causing the system to reject the entry.
  Transaction Type Restrictions: The type of transaction you are trying to perform may not allow for the use of