How To Fix /UI5/DTA019 - App variant id should have 'customer.' prefix

/UI5/DTA019 - Overview

• Message type: E = Error

• Message class: /UI5/DTA -

• Message number: 019

• Message text: App variant id should have 'customer.' prefix

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/DTA019 - Details

• The SAP error message /UI5/DTA019 App variant id should have 'customer.' prefix typically occurs in the context of SAP Fiori applications when dealing with app variants. This error indicates that the application variant ID you are trying to use does not conform to the naming convention expected by the system.
  
  Cause:
  The error arises because SAP requires that custom app variants (those created by users) must have a specific prefix, in this case, customer.. This is a part of the naming convention to differentiate between standard SAP variants and customer-specific variants. If the variant ID does not start with customer., the system will reject it and throw this error.
  
  Solution:
  To resolve this error, you need to ensure that any app variant IDs you create or use start with the prefix customer.. Here are the steps you can take:
  
  
  Check the Variant ID: Review the variant ID you are trying to use and ensure it