How To Fix 00953 - DB error: Specified key already used

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 953

• Message text: DB error: Specified key already used

What causes this issue?

The attempted operation (INSERT or UPDATE) violates the uniqueness of
the primary key or another index defined as UNIQUE.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check your ABAP program.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 00953 - DB error: Specified key already used ?

  The SAP error message "00953 DB error: Specified key already used" typically occurs when there is an attempt to insert a record into a database table where the primary key or unique key constraint is violated. This means that the key value you are trying to insert already exists in the table, which is not allowed for primary or unique keys.
  Causes:
  
  Duplicate Key Insertion: You are trying to insert a record with a key that already exists in the database.
  Data Migration Issues: During data migration or batch processing, duplicate records may be attempted to be inserted.
  Concurrency Issues: Multiple transactions trying to insert the same key at the same time 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 key attempts.
  
  Solutions:
  
  
  Check Existing Records: Before inserting a new record, check if a record with the same key already exists in the database. You can do this by querying the table.
  SELECT * FROM your_table WHERE your_key_column = 'your_key_value';
  
  
  Modify the Key: If the key is meant to be unique, ensure that the new record has a unique key value. This may involve generating a new key or modifying the existing one.
  
  
  Handle Duplicates in Code: If you are using custom ABAP code, implement error handling to check for existing records before attempting to insert. You can use SELECT statements to verify the existence of the key.
  
  
  Review Data Migration Logic: If this error occurs during data migration, review the logic to ensure that duplicates are not being introduced. You may need to clean up the source data or adjust the migration logic.
  
  
  Transaction Management: If the error is due to concurrency, consider implementing proper transaction management or locking mechanisms to prevent simultaneous inserts of the same key.
  
  
  Database Constraints: Review the database constraints and ensure they are correctly defined. If necessary, adjust the constraints based on your business requirements.
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary) to check the table structure and constraints.
  Debugging: Use transaction SE80 or SE37 to debug the custom code that may be causing the issue.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Logs: Review application logs (transaction SLG1) for more details on the error context.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.