How to upload existing ionic app

I have a working Ionic3 - Angular4 app running.
When I use the cli command ionic upload I’m asked “Which app would you like to link” and the only options are “Create a new app” and “Nevermind” but my currently running app is not detected. How can I link it?

What you see are “apps” on that you connect your sourcecode to. So you want to create a new one there, then link your local sourcecode to the newly created “app” online by running this command again.