How To Fix F8123 - The posting key on the debit side is not a debit posting key

SAP Error Message - Details

• Message type: E = Error

• Message class: F8 -

• Message number: 123

• Message text: The posting key on the debit side is not a debit posting key

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message F8123 - The posting key on the debit side is not a debit posting key ?

  The SAP error message F8123, which states "The posting key on the debit side is not a debit posting key," typically occurs during the posting of financial documents in SAP. This error indicates that the system has detected an inconsistency with the posting keys used in the transaction. Here’s a breakdown of the cause, solution, and related information for this error:
  Cause:
  
  Incorrect Posting Key: The posting key used for the debit side of the transaction is not defined as a debit posting key in the SAP system. Posting keys are used to determine the type of transaction (debit or credit) and the account types that can be posted to.
  Configuration Issues: There may be a configuration issue in the Financial Accounting (FI) module where the posting keys are not set up correctly.
  User Error: The user may have inadvertently selected the wrong posting key while entering the transaction.
  
  Solution:
  
  
  Check Posting Keys:
  
  Verify the posting key used in the transaction. Ensure that it is a valid debit posting key (e.g., 40 for customer debit, 50 for vendor debit, etc.).
  You can check the posting keys in the SAP system by navigating to the configuration settings: SPRO > Financial Accounting > General Ledger > Document > Document Entry > Define Posting Keys.
  
  
  
  Correct the Entry:
  
  If the wrong posting key was used, correct the entry by selecting the appropriate debit posting key.
  Re-enter the transaction with the correct posting key.
  
  
  
  Review Configuration:
  
  If you suspect a configuration issue, consult with your SAP FI configuration team to ensure that the posting keys are set up correctly and that the necessary settings are in place.
  
  
  
  User Training:
  
  Provide training to users on how to select the correct posting keys to avoid similar errors in the future.
  
  
  
  Related Information:
  
  
  Posting Keys: Posting keys are two-digit numbers that control the type of posting (debit or credit) and the account types that can be posted. Common debit posting keys include:
  
  40: Customer debit
  50: Vendor debit
  01: Asset debit
  20: General ledger debit
  
  
  
  Transaction Codes: You can use transaction codes like FB01 (Post Document) or FB50 (G/L Account Document Entry) to enter financial documents and check for errors.
  
  
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message. You can search for relevant notes in the SAP Support Portal.
  
  
  By following these steps, you should be able to resolve the F8123 error and successfully post your financial documents in SAP.