How To Fix /IWBEP/CM_MGW_APPS021 - Source keys are missing for entity set &1

/IWBEP/CM_MGW_APPS021 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_APPS -

• Message number: 021

• Message text: Source keys are missing for entity set &1

Self-Explanatory Message

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/IWBEP/CM_MGW_APPS021 - Details

• The SAP error message /IWBEP/CM_MGW_APPS021 indicates that source keys are missing for a specific entity set in an OData service. This typically occurs when the OData service is trying to process a request for an entity set, but it cannot find the necessary keys to identify the specific records.
  
  Cause:
  
  Missing Key Fields: The entity set being accessed does not have the required key fields defined in the OData service metadata.
  Incorrect Request: The request being sent to the OData service may not include the necessary key parameters.
  Service 
  Configuration Issues: There may be issues with the configuration of the OData service or the underlying data model.
  Data Model Changes: If there have been recent changes to the data model (e.g., adding or removing key fields), the OData service may not be updated accordingly.
  
  
  Solution:
  
  
  Check Entity Set Definition: Verify that the entity set in the OData service has the correct key fields defined. You can do