How To Fix /UI5/MP_CA_APP015 - Annotation &1 already exists in the annotations of datasource &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI5/MP_CA_APP -

• Message number: 015

• Message text: Annotation &1 already exists in the annotations of datasource &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI5/MP_CA_APP015 - Annotation &1 already exists in the annotations of datasource &2 ?

  The SAP error message /UI5/MP_CA_APP015 Annotation &1 already exists in the annotations of datasource &2 typically occurs in the context of SAP Fiori applications or when working with OData services in SAP UI5. This error indicates that there is a duplicate annotation defined for a specific data source.
  Cause:
  The error is caused by the presence of multiple definitions of the same annotation for a given data source in your OData service or in the metadata of your application. This can happen due to:
  
  Duplicate Annotations: The same annotation is defined more than once in the metadata of the OData service.
  Merging of Annotations: If annotations are being merged from different sources, and the same annotation is included multiple times.
  Incorrect Configuration: Misconfiguration in the service definition or in the application that leads to the same annotation being processed multiple times.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Annotations: Review the annotations defined in your OData service. Look for duplicate entries for the annotation mentioned in the error message. You can do this by examining the metadata document of the OData service.
  
  
  Remove Duplicates: If you find duplicate annotations, remove or consolidate them to ensure that each annotation is defined only once for the data source.
  
  
  Update Service: If you are using a service that is generated from a CDS view or similar, ensure that the annotations are correctly defined in the CDS view and regenerate the service if necessary.
  
  
  Clear Cache: Sometimes, caching issues can lead to this error. Clear the cache of your SAP Gateway or the browser cache if you are testing in a browser.
  
  
  Check for Merging Issues: If you are merging annotations from multiple sources, ensure that the merging logic does not introduce duplicates.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to understand how annotations should be defined and any limitations that may apply.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  OData Service Metadata: You can access the metadata of your OData service by appending $metadata to the service URL. This will help you inspect the annotations.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the error message /UI5/MP_CA_APP015.