How To Fix R8657 - Key change on DataSource &1 was applied

R8657 - Overview

• Message type: E = Error

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

• Message number: 657

• Message text: Key change on DataSource &1 was applied

Self-Explanatory Message

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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 R8657 - Key change on DataSource &1 was applied ?

  The SAP error message R8657 indicates that a key change has been applied to a DataSource, which can lead to issues in data extraction or data consistency. This message typically arises in the context of SAP BW (Business Warehouse) or SAP Data Services when there are changes made to the structure of a DataSource, such as changes to the key fields.
  
  Cause:
  
  Key Field Changes: The primary cause of this error is that the key fields of the DataSource have been modified. This could happen due to changes in the underlying source system or adjustments made in the DataSource configuration.
  Data Inconsistency: If the key fields are changed, it can lead to inconsistencies in the data being extracted, as the system may not be able to match records correctly.
  DataSource Activation: The error may also occur during the activation of the DataSource after changes have been made.
  
  
  Solution:
  
  Review Changes: Check the changes made to the