Message type: E = Error
Message class: /UI5/MP_CA_APP -
Message number: 009
Message text: DataSource with id &1 already exists in base descriptor
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The SAP error message /UI5/MP_CA_APP009 DataSource with id &1 already exists in base descriptor typically occurs in the context of SAP Fiori or SAPUI5 applications when there is an attempt to register a data source that has already been defined in the base descriptor. This can happen during the development or deployment of applications that utilize the SAP Gateway or OData services.
Cause: Duplicate Data Source Registration: The error indicates that there is an attempt to register a data source with an ID that already exists in the base descriptor. This can happen if: The same data source is defined multiple times in the application descriptor files (e.g., manifest.json). There are conflicting definitions in different components or modules of the application. The application is being redeployed without proper cleanup of previous versions. Caching Issues: Sometimes, caching mechanisms may cause the system to retain old definitions, leading to conflicts when new definitions are introduced.
Solution: Check for Duplicates: Review
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