Unable to publish a custom Application to 'My Application Repository' using Studio. The following error is issued: "<Application_name>" could not be uploaded due to the following error: Scope or App Id already exists in a different combination.
This error occurs when there is a mismatch in the Application Repository between the Application Scope and source_app_id. This combination is supposed to be unique. This can happen when the Application is published to an Updated Set and the source_app_id is modified before the Application is reloaded on another instance.
Contact ServiceNow Customer Support to clean up the Application Repository.