How To Fix FMFG623 - Cannot change trading partner fields; predecessor document exists

SAP Error Message - Details

• Message type: E = Error

• Message class: FMFG - U.S. Federal Government Message Class

• Message number: 623

• Message text: Cannot change trading partner fields; predecessor document 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 FMFG623 - Cannot change trading partner fields; predecessor document exists ?

  The SAP error message FMFG623 indicates that you are trying to change trading partner fields in a document, but the system has detected that a predecessor document exists. This typically occurs in the context of financial transactions or document postings where trading partner information is critical for proper accounting and reporting.
  Cause:
  The error arises because:
  
  Predecessor Document Exists: There is a linked or predecessor document that has already been posted, and changing the trading partner fields in the current document could lead to inconsistencies in the financial records.
  Data Integrity: SAP enforces data integrity rules to ensure that financial documents remain consistent and accurate. Changing trading partner information could affect the accounting entries related to the predecessor document.
  
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Check Predecessor Documents: Identify the predecessor document that is causing the issue. You can do this by reviewing the document flow or using transaction codes like FB03 (Display Document) to see the related documents.
  
  
  Avoid Changes: If the predecessor document is already posted and you cannot change it, you may need to leave the trading partner fields as they are. If the change is necessary, you might need to reverse or adjust the predecessor document first.
  
  
  Consult with Finance Team: If you are unsure about the implications of changing trading partner fields, consult with your finance or accounting team. They can provide guidance on whether the change is necessary and how to proceed.
  
  
  Use Document Change Options: If you need to make changes, consider using the appropriate document change options or transactions that allow for adjustments without violating the integrity of the predecessor documents.
  
  
  SAP Notes and Support: If the issue persists or if you believe it is a system error, check for any relevant SAP Notes or patches that might address this specific error. You can also reach out to SAP support for assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like FB03 (Display Document), FB02 (Change Document), and FB08 (Reverse Document) to manage financial documents effectively.
  Document Flow: Understanding the document flow in SAP can help you trace related documents and understand the dependencies between them.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to financial documents, as restrictions may also lead to errors.
  
  By following these steps, you should be able to address the FMFG623 error and proceed with your financial transactions in SAP.