Cannot create a second Identifier

I have an application that uses WeatherKit for which I use the registered identifier com.[mycompanyname].[myappname] .

I'm now developing a second application using WeatherKit, so I need to create a new identifier on https://developer.apple.com/account/resources/identifiers/add/appId/bundle so that WeatherKit will recognize requests from com.[mycompanyname].[myappname2].

(in this post, I'm using "[***]" instead of the real strings)

When I go to create an identifier for the new app, I get the error message:

An attribute in the provided entity has invalid value

An App ID with Identifier 'com.[mycompanyname].[myappname2]' is not available. Please enter a different string.

Can anybody explain why I can't register the new app name, and how I can fix this?

Cannot create a second Identifier
 
 
Q