How To Fix /IWBEP/SBOD122 - Principal Key '&1' for referential constraint must be a key property

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/SBOD -

• Message number: 122

• Message text: Principal Key '&1' for referential constraint must be a key property

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/SBOD122 - Principal Key '&1' for referential constraint must be a key property ?

  The SAP error message /IWBEP/SBOD122 indicates that there is an issue with a principal key in a referential constraint within your OData service. Specifically, the error states that the principal key must be a key property, which means that the key you are trying to use in a relationship is not defined as a key in the entity type.
  Cause:
  
  Missing Key Property: The principal key you are trying to reference in a relationship is not defined as a key property in the entity type.
  Incorrect Configuration: The entity model may not be correctly configured, leading to a situation where the referential integrity cannot be maintained.
  Data Model Issues: There may be inconsistencies in the data model where the relationships between entities are not properly defined.
  
  Solution:
  
  
  Check Entity Definition: Ensure that the entity type you are referencing has the correct key properties defined. You can do this by checking the metadata of the OData service.
  
  Go to the service definition in the SAP Gateway Service Builder (transaction code SEGW).
  Open the entity type and verify that the key properties are correctly defined.
  
  
  
  Define Key Properties: If the principal key is not defined, you need to add it as a key property in the entity type.
  
  In the Service Builder, select the entity type and add the necessary properties to the key.
  
  
  
  Update Referential Constraints: After ensuring that the key properties are correctly defined, check the referential constraints in your model.
  
  Make sure that the relationships between entities are correctly set up and that they reference valid key properties.
  
  
  
  Regenerate the Service: After making changes, regenerate the OData service to ensure that the changes take effect.
  
  Use the "Generate Runtime Objects" option in the Service Builder.
  
  
  
  Test the Service: After regeneration, test the OData service to ensure that the error is resolved and that the relationships are functioning as expected.
  
  
  Related Information:
  
  OData Service Metadata: You can view the metadata of your OData service by appending $metadata to the service URL. This will help you understand the structure of your entities and their relationships.
  SAP Gateway Documentation: Refer to the official SAP Gateway documentation for more details on entity definitions, key properties, and referential constraints.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SEGW (Service Builder) and /IWBEP/REG_SERVICE (Register OData Service) for managing OData services.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service is correctly configured.