How To Fix /SAPCE/FK_C1004 - Entry with key &1 already exists - duplicate key error

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPCE/FK_C1 -

• Message number: 004

• Message text: Entry with key &1 already exists - duplicate key error

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPCE/FK_C1004 - Entry with key &1 already exists - duplicate key error ?

  The SAP error message /SAPCE/FK_C1004 Entry with key &1 already exists - duplicate key error typically indicates that there is an attempt to create or insert a record in a database table where a record with the same key already exists. This is a common issue in database management systems, including SAP, where unique constraints are enforced on certain fields.
  Cause:
  
  
  Duplicate Entry: The most straightforward cause is that the system is trying to insert a record with a key that already exists in the database. This could happen due to:
  
  Manual data entry errors.
  Data import processes that do not check for existing records.
  Incorrect logic in custom programs or enhancements that lead to duplicate entries.
  
  
  
  Data Migration Issues: If data is being migrated from another system or from legacy data, there may be duplicates that were not identified before the migration.
  
  
  Concurrency Issues: In a multi-user environment, two users might attempt to create the same record simultaneously, leading to a conflict.
  
  
  Solution:
  
  
  Identify the Duplicate: Use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to check the table where the error is occurring. Look for the existing entry with the key mentioned in the error message.
  
  
  Data Cleanup: If duplicates are found, you may need to delete or modify the existing records to resolve the conflict. Ensure that you have backups and that you understand the implications of deleting data.
  
  
  Modify Data Entry Logic: If the error is occurring due to a custom program or enhancement, review the logic to ensure that it checks for existing records before attempting to insert new ones.
  
  
  Implement Error Handling: If the error is due to concurrent access, consider implementing error handling in your programs to manage such conflicts gracefully.
  
  
  Data Migration Review: If this error arises during data migration, review the migration process to ensure that it includes checks for existing records and handles duplicates appropriately.
  
  
  Consult Documentation: Check SAP notes and documentation for any specific guidance related to the error message and the context in which it occurs.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11, SE16, and SE37 (for function modules) to analyze and troubleshoot the issue.
  SAP Notes: Search the SAP Support Portal for notes related to this error message for any patches or updates that may address the issue.
  Database Constraints: Understand the database constraints that are in place for the table in question, as these will dictate what constitutes a duplicate entry.
  
  By following these steps, you should be able to identify the cause of the duplicate key error and implement a solution to resolve it.