How To Fix /IWBEP/CM_V4_MED322 - Technical property '&1' cannot be set as key property in entity type '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 322

• Message text: Technical property '&1' cannot be set as key property in entity type '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED322 - Technical property '&1' cannot be set as key property in entity type '&2' ?

  The SAP error message /IWBEP/CM_V4_MED322 indicates that there is an issue with the configuration of an OData service, specifically related to the definition of key properties in an entity type. The error message states that a technical property (represented by &1) cannot be set as a key property in the specified entity type (represented by &2).
  Cause:
  
  
  Technical Properties: The property you are trying to set as a key is a technical property, which typically means it is not intended to be used as a key in the OData model. Technical properties are usually system-generated or managed properties that do not have a business meaning.
  
  
  Key Property Constraints: In OData, key properties must be unique identifiers for the entity type. If the property does not meet the criteria for being a key (e.g., it is not unique or is not intended to be used as a key), this error will occur.
  
  
  Model Configuration: There may be issues in the way the OData model is configured, such as incorrect annotations or definitions in the metadata.
  
  
  Solution:
  
  
  Review Entity Type Definition: Check the definition of the entity type in your OData service. Ensure that the properties you are trying to set as keys are appropriate and meet the criteria for key properties.
  
  
  Change Key Property: If the property in question is indeed a technical property, consider using a different property that is suitable as a key. This should be a property that uniquely identifies each instance of the entity.
  
  
  Update Metadata: If you have made changes to the entity type or its properties, ensure that the metadata is updated accordingly. This may involve regenerating the OData service or refreshing the metadata.
  
  
  Check Annotations: Review any annotations in your OData model that may incorrectly designate a technical property as a key. Correct any misconfigurations.
  
  
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance on the entity type and properties you are working with. There may be additional constraints or best practices to follow.
  
  
  Related Information:
  
  OData Service Configuration: Familiarize yourself with the OData service configuration in SAP, including how to define entity types, properties, and keys.
  SAP Gateway: If you are using SAP Gateway, check the transaction codes like /IWFND/MAINT_SERVICE to manage your OData services.
  Debugging: Use debugging tools available in SAP to trace the execution and identify where the error is being triggered.
  
  By following these steps, you should be able to resolve the error and correctly configure your OData service.