How To Fix KK053 - The keys of the source and target tables are the same

SAP Error Message - Details

• Message type: E = Error

• Message class: KK -

• Message number: 053

• Message text: The keys of the source and target tables are the same

What causes this issue?

While copying unit cost estimates, the system found that the key of the
source table is the same as the key of the target table.

System Response

Processing was terminated.

How to fix this error?

Notify your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KK053 - The keys of the source and target tables are the same ?

  The SAP error message KK053 ("The keys of the source and target tables are the same") typically occurs during the process of transferring or copying data between two tables in SAP, particularly in the context of controlling (CO) or financial (FI) modules. This error indicates that the system has detected that the keys (primary identifiers) of both the source and target tables are identical, which can lead to conflicts or data integrity issues.
  Cause:
  
  Identical Keys: The most common cause of this error is that the source and target tables are configured to use the same key fields. When the system attempts to perform an operation that requires unique keys, it cannot proceed because it would result in duplicate entries.
  Incorrect Configuration: There may be a misconfiguration in the data transfer settings or in the way the tables are defined in the system.
  Data Migration Issues: If you are migrating data from one system to another or from one table to another, the keys may not have been properly adjusted to ensure uniqueness.
  
  Solution:
  
  Check Table Definitions: Review the definitions of both the source and target tables to ensure that they are set up correctly and that the keys are not identical. You may need to adjust the key fields in one of the tables.
  Modify Data Transfer Logic: If you are using a custom program or a data transfer tool, ensure that the logic correctly handles the keys. You may need to implement a mechanism to change or map the keys appropriately.
  Use Unique Identifiers: If possible, modify the data in the source table to ensure that the keys are unique before attempting the transfer.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the tables and processes you are working with.
  Seek Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for assistance. They may have encountered similar issues and can provide insights or solutions.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may be using transaction codes like KK01 (Create Internal Order), KK02 (Change Internal Order), or others related to controlling and financial transactions.
  Data Migration Tools: If you are using tools like LSMW (Legacy System Migration Workbench) or SAP Data Services, ensure that the mapping and transformation rules are correctly set up to avoid key conflicts.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify the root cause of the KK053 error and implement a solution to resolve it.