How To Fix ACM_UI051 - A DDL source and a CDS entity with name "&1" exist. Specify one type

SAP Error Message - Details

• Message type: E = Error

• Message class: ACM_UI - Message-Class for all ACM-UIs

• Message number: 051

• Message text: A DDL source and a CDS entity with name "&1" exist. Specify one type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ACM_UI051 - A DDL source and a CDS entity with name "&1" exist. Specify one type ?

  The SAP error message ACM_UI051 indicates a conflict between a Data Definition Language (DDL) source and a Core Data Services (CDS) entity that share the same name. This situation arises when both a DDL source (like a database table or view) and a CDS view are defined with the same identifier, leading to ambiguity in the system.
  Cause:
  The error occurs because:
  
  There is a naming conflict where both a DDL source and a CDS entity have been defined with the same name.
  The system cannot determine which object to reference when the name is used, leading to confusion in processing.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Rename One of the Objects:
  
  If you have control over the DDL source or the CDS entity, consider renaming one of them to eliminate the conflict. Ensure that the new name adheres to naming conventions and is unique within the relevant namespace.
  
  
  
  Check Object Definitions:
  
  Review the definitions of both the DDL source and the CDS entity to confirm their purposes and usage. This can help you decide which one to rename or if any adjustments are needed.
  
  
  
  Use Fully Qualified Names:
  
  If renaming is not feasible, consider using fully qualified names (including the namespace) when referencing the objects in your code or queries. This can help the system differentiate between the two.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or guidelines regarding naming conventions and best practices for DDL sources and CDS entities to avoid such conflicts in the future.
  
  
  
  Check for Dependencies:
  
  Ensure that renaming or modifying one of the objects does not break any existing dependencies or references in your application.
  
  
  
  Related Information:
  
  Core Data Services (CDS): CDS is a framework for defining and consuming semantically rich data models in SAP. It allows for the creation of views that can be used in various applications.
  Data Definition Language (DDL): DDL is a subset of SQL used to define and manage all database objects, including tables, views, and schemas.
  Naming Conventions: Following consistent naming conventions is crucial in SAP development to avoid conflicts and ensure clarity in object identification.
  
  By addressing the naming conflict and following best practices, you can resolve the ACM_UI051 error and prevent similar issues in the future.