How To Fix /SMB/FKCHK001 - Entry is already existing in database table

SAP Error Message - Details

• Message type: E = Error

• Message class: /SMB/FKCHK -

• Message number: 001

• Message text: Entry is already existing in database 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 /SMB/FKCHK001 - Entry is already existing in database table ?

  The SAP error message /SMB/FKCHK001 Entry is already existing in database table typically indicates that there is an attempt to insert a record into a database table where a record with the same key already exists. This can occur in various scenarios, such as during data uploads, migrations, or when trying to create new entries in a table that requires unique keys.
  Causes:
  
  Duplicate Key Violation: The most common cause is that the data being inserted has a primary key or unique constraint that already exists in the database.
  Data Migration Issues: During data migration or uploads, if the data is not properly cleaned or deduplicated, it can lead to attempts to insert duplicate records.
  Concurrency Issues: If multiple processes are trying to insert the same record simultaneously, it can lead to this error.
  Incorrect Logic in Custom Code: If there is custom ABAP code or enhancements that handle data insertion, there may be logic errors leading to duplicate entries.
  
  Solutions:
  
  Check for Existing Records: Before attempting to insert a new record, check if a record with the same key already exists in the database. This can be done using a SELECT query.
  Data Cleansing: If the error occurs during data migration, ensure that the data being uploaded is cleansed and does not contain duplicates.
  Modify Insertion Logic: If you are using custom code, review the logic to ensure that it properly handles existing records. You may want to implement an "update if exists" logic instead of a direct insert.
  Error Handling: Implement error handling in your code to catch this specific error and take appropriate action, such as logging the error or notifying the user.
  Database Constraints: Review the database constraints and ensure they are correctly defined. If necessary, adjust the constraints to allow for the intended data structure.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary) to check the structure of the table and its constraints.
  Debugging: If the error is occurring in custom code, use transaction SE80 or SE37 to debug the relevant function modules or programs.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Logs: Review application logs (transaction SLG1) for more detailed error messages that may provide context on why the duplicate entry is being attempted.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.