Cant Delete Application because imaginary Deployment?

Hello everyone,

I'm new with SCCM and need some help with this:

I made a Application because I wanted to test the Application Feature etc.

After correctly installing and uninstalling the software I came back a week later and Software Center tells me that the software (and one other) is no longer available for no reason.

Maybe i did something wrong while managing other stuff but I simply came to the conclusion that i want to delete the Application in SCCM since it was only for test purpose.

I went into SCCM, deleted the deployment and tried to delete the application, but the deployments counter is on 1 and when I look into the deployments it says 'No items found.'

So SCCM tells me that i can't delete a application when its still deployed.

I cant find where this deployment should be:

Is there any other way to force the Application to get deleted?

Greetings, Paxz.