How To Fix /BOBF/CONF_CDS049 - [BO check] Key type has to be 'legacy' like parent view (view &1)

SAP Error Message - Details

• Message type: E = Error

• Message class: /BOBF/CONF_CDS -

• Message number: 049

• Message text: [BO check] Key type has to be 'legacy' like parent view (view &1)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /BOBF/CONF_CDS049 - [BO check] Key type has to be 'legacy' like parent view (view &1) ?

  The SAP error message /BOBF/CONF_CDS049 [BO check] Key type has to be 'legacy' like parent view (view &1) typically occurs in the context of Business Object Framework (BOF) and Core Data Services (CDS) views in SAP. This error indicates that there is a mismatch in the key type definition between a child view and its parent view.
  Cause:
  
  Key Type Mismatch: The error arises when the key type of a child view is not set to 'legacy', while the parent view (referenced in the error message) is defined with a key type of 'legacy'. In SAP, key types can be defined as 'legacy' or 'non-legacy', and they must be consistent across parent-child relationships in the data model.
  Modeling Error: This can happen due to incorrect modeling of the CDS views or Business Object definitions, where the child view is expected to inherit the key type from the parent view.
  
  Solution:
  
  Check Key Type Definition: Review the key type definition of both the parent and child views. Ensure that the child view's key type is set to 'legacy' to match the parent view.
  Modify the Child View: If the child view is incorrectly defined, you may need to modify its definition in the ABAP Development Tools (ADT) or the relevant transaction (like SE11 or SE80) to ensure it aligns with the parent view's key type.
  Re-activate the Views: After making the necessary changes, re-activate both the parent and child views to ensure that the changes take effect.
  Check for Dependencies: Ensure that there are no other dependencies or references that might be affected by this change.
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) views are a way to define semantic data models in SAP. They allow for the definition of complex data models that can be consumed by various applications.
  Business Object Framework (BOF): The Business Object Framework is used to define business objects in SAP, which can include various data models and their relationships.
  Legacy Key Type: The 'legacy' key type is often used for compatibility with older systems or for specific business scenarios where a certain key structure is required.
  
  Additional Steps:
  
  Consult Documentation: Refer to SAP Help documentation or the SAP Community for more insights on the specific error and best practices for defining CDS views and business objects.
  Debugging: If the issue persists, consider debugging the data model to trace where the mismatch occurs and ensure that all related views are correctly defined.
  
  By following these steps, you should be able to resolve the error and ensure that your CDS views and business objects are correctly configured.