Hi @SrinivasuB 

Solutions

1. Use ServiceNow Studio or Creator Studio:

• These tools allow you to specify and modify the application scope during creation.
• Ensure the scope identifier you choose is unique within your instance. See next section.

2. Check Existing Application Scopes:

• Navigate to the list of scoped applications by typing sys_scope.list in the application navigator and pressing Enter.
• Review the list to see if the desired scope already exists.

3. Choose a Unique Scope Identifier:

• If a conflict exists, modify the application name or manually set a distinct scope identifier to ensure uniqueness.

https://www.servicenow.com/community/app-engine-articles/resolving-this-scope-is-already-taken-by-an...