How To Fix GG491 - Required fields already exist in the line item table

GG491 - Overview

• Message type: E = Error

• Message class: GG - Messages for FI-SL customizing

• Message number: 491

• Message text: Required fields already exist in the line item table

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GG491 - Required fields already exist in the line item table ?

  The SAP error message GG491, which states "Required fields already exist in the line item table," typically occurs during the posting of financial documents, particularly in the context of General Ledger (G/L) accounting. This error indicates that the system has detected that the required fields for a line item are already populated, which may lead to inconsistencies or duplication in the data.
  
  Cause:
  
  Duplicate Entries: The error often arises when there is an attempt to post a document that contains line items with fields that are already filled in, leading to a conflict.
  Incorrect Configuration: There may be issues with the configuration of the G/L accounts or the document types being used.
  Data Integrity Issues: If there are inconsistencies in the data being posted, such as missing or incorrect information in required fields, this error can occur.
  Custom Code or Enhancements: If there are custom developments or enhancements in the system that manipulate line item