How To Fix G0399 - A data row already exists with the same key

SAP Error Message - Details

• Message type: E = Error

• Message class: G0 - Messages for SAP Consolidation

• Message number: 399

• Message text: A data row already exists with the same key

What causes this issue?

The key fields of the current data row contain values identical to
those in the key fields of a data row already in the database.

System Response

The original database entry will be overwritten by the contents of the
imported data row.

How to fix this error?

If you do not want the original database entry to be overwritten,
delete the data row with the identical key from file &V1& before
importing in update mode.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message G0399 - A data row already exists with the same key ?

  The SAP error message G0399, which states "A data row already exists with the same key," typically occurs when there is an attempt to insert or update a record in a database table where a unique constraint is violated. This means that the system is trying to create a new entry that has the same key (or unique identifier) as an existing entry in the database.
  Causes:
  
  
  Duplicate Key Entry: The most common cause is that the data being entered has a key that already exists in the database. This could be due to:
  
  Manual data entry errors.
  Data import processes that do not check for existing records.
  Incorrect logic in custom programs or reports that generate new records.
  
  
  
  Data Migration Issues: During data migration or system upgrades, if the data is not properly cleaned or transformed, it can lead to duplicates.
  
  
  Concurrency Issues: If multiple users or processes are trying to insert the same record simultaneously,