How To Fix /UI5/APP_API136 - Descriptor Id &1 is not unique

/UI5/APP_API136 - Overview

• Message type: E = Error

• Message class: /UI5/APP_API -

• Message number: 136

• Message text: Descriptor Id &1 is not unique

Self-Explanatory Message

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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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/UI5/APP_API136 - Details

• The SAP error message /UI5/APP_API136 Descriptor Id &1 is not unique typically occurs in the context of SAP Fiori applications or SAPUI5 development. This error indicates that there are multiple entries with the same descriptor ID in the application descriptor files, which should be unique.
  
  Cause:
  
  
  Duplicate Descriptor IDs: The most common cause of this error is that there are multiple entries in the manifest.json or other configuration files where the descriptor ID is defined. This can happen if:
  
  You have multiple components or modules defined with the same ID.
  There are conflicting entries in the application configuration.
  
  
  
  Incorrect Configuration: Sometimes, the error can arise from incorrect or incomplete configuration in the application files, leading to ambiguity in identifying the components.
  
  
  
  Solution:
  
  
  Check for Duplicates:
  
  Open the manifest.json file of your SAPUI5 application.
  Look for the sap.app section and check the id property. Ensure that it is unique across your application.
  If you have multiple components or modules, ensure that