How To Fix C$323 - Key & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: C$ -

• Message number: 323

• Message text: Key & already 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message C$323 - Key & already exists ?

  The SAP error message C$323, which states "Key & already exists," typically occurs when you are trying to create or insert a record in a database table where a unique key constraint is violated. This means that the key you are trying to use already exists in the database, and the system does not allow duplicate entries for that key.
  Cause:
  
  Duplicate Key Entry: You are attempting to insert a record with a key that already exists in the database table.
  Data Migration Issues: If you are migrating data from one system to another, there may be conflicts with existing keys.
  Incorrect Logic in Custom Code: If you have custom ABAP code or enhancements, there may be logic that does not properly check for existing keys before attempting to insert new records.
  Concurrent Processing: Multiple users or processes may be trying to insert the same key at the same time.
  
  Solution:
  
  Check Existing Records: Before inserting a new record, check the database table to see if the key already exists. You can do this using transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser).
  Modify the Key: If the key must be unique, consider modifying the key value you are trying to insert to ensure it does not conflict with existing records.
  Error Handling in Code: If you are using custom ABAP code, implement error handling to catch this specific error and handle it gracefully, such as by notifying the user or logging the error.
  Data Cleanup: If you are migrating data, ensure that the data being migrated does not contain duplicates. You may need to clean up the source data before migration.
  Review Business Logic: Ensure that the business logic that generates keys is functioning correctly and is not producing duplicates.
  
  Related Information:
  
  Transaction Codes: Use SE11 to view the table structure and constraints, and SE16 to view the data in the table.
  Database Constraints: Understand the unique constraints defined on the table to know which fields are part of the key.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Debugging: If the error occurs in a custom program, use the ABAP debugger to trace the execution and identify where the duplicate key is being generated.
  
  By following these steps, you should be able to resolve the C$323 error and prevent it from occurring in the future.