How To Fix R8658 - Key change on DataSource &1

SAP Error Message - Details

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 658

• Message text: Key change on DataSource &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message R8658 - Key change on DataSource &1 ?

  The SAP error message R8658, which states "Key change on DataSource &1," typically occurs when there is a change in the key fields of a DataSource in SAP BW (Business Warehouse). This can happen when the underlying data structure of the source system changes, such as when fields are added, removed, or modified in a way that affects the primary key.
  Cause:
  
  Change in Source System: The most common cause is a modification in the source system (like an SAP ERP system) where the DataSource is defined. This could involve changes to the database table structure, such as adding or removing fields that are part of the key.
  DataSource Configuration: If the DataSource configuration in BW is not aligned with the changes made in the source system, it can lead to this error.
  Inconsistent Data: If the data in the source system does not match the expected structure in BW, it can trigger this error.
  
  Solution:
  
  Check Source System Changes: Review any recent changes made to the source system that could affect the DataSource. This includes checking for changes in the underlying tables or structures.
  Update DataSource in BW:
  
  Go to the DataSource in the SAP BW system.
  Adjust the DataSource definition to reflect the changes made in the source system.
  If necessary, regenerate the DataSource.
  
  
  Re-activate the DataSource: After making changes, ensure that the DataSource is reactivated in BW.
  Check for Data Consistency: Ensure that the data in the source system is consistent with the new structure. You may need to perform data cleansing or adjustments.
  Test Data Extraction: After making the necessary changes, test the data extraction process to ensure that it works without errors.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like RSA1 (Data Warehousing Workbench) to manage DataSources and check their settings.
  Documentation: Refer to SAP documentation or notes related to DataSource changes and key field management for more detailed guidance.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to DataSource key changes.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or BW team for further investigation, as they may have additional insights or tools to diagnose the issue.