How To Fix /UI5/APP_API142 - Duplicate Id: Id &1 already contained in SAPUI5 Repository &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI5/APP_API -

• Message number: 142

• Message text: Duplicate Id: Id &1 already contained in SAPUI5 Repository &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI5/APP_API142 - Duplicate Id: Id &1 already contained in SAPUI5 Repository &2 ?

  The SAP error message /UI5/APP_API142 Duplicate Id: Id &1 already contained in SAPUI5 Repository &2 typically indicates that there is a duplicate identifier (ID) in the SAPUI5 application you are working on. This error occurs when the same ID is used for multiple UI5 components or controls within the same application or when the same ID is registered in the SAPUI5 repository.
  Cause:
  
  Duplicate IDs: The most common cause is that two or more UI5 controls or components are using the same ID. In UI5, each control must have a unique ID within the same view or component.
  Incorrect Component Registration: If a component is registered multiple times with the same ID in the SAPUI5 repository, it can lead to this error.
  Dynamic ID Generation: If IDs are generated dynamically and the logic does not ensure uniqueness, it can lead to duplicates.
  
  Solution:
  
  Check for Duplicate IDs: Review your code to ensure that all IDs assigned to UI5 controls are unique. This includes checking for IDs in XML views, JavaScript, and any dynamically created controls.
  Use Unique Prefixes: When generating IDs dynamically, consider using unique prefixes or suffixes based on the context (e.g., using the parent control's ID as a prefix).
  Debugging: Use debugging tools to trace where the IDs are being assigned and identify duplicates. You can log the IDs to the console to see if any duplicates are being created.
  Review Component Registration: If you are registering components in the SAPUI5 repository, ensure that each component has a unique ID.
  Refactor Code: If necessary, refactor your code to avoid ID collisions, especially in complex applications with multiple views or components.
  
  Related Information:
  
  SAPUI5 Documentation: Refer to the official SAPUI5 documentation for best practices on ID management and component registration.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  Version Control: If you are using version control, check the history of changes to see if recent changes introduced duplicate IDs.
  
  By following these steps, you should be able to resolve the /UI5/APP_API142 Duplicate Id error and ensure that your SAPUI5 application runs smoothly.