github deploy keys: how Do I authorize more than one repository for a single machine
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So, I have a host, call it `rob`. I used ssh-keygen on `rob` to get a public key, which I gave to github in the add a new deploy key screen for repository `cheech`. Now I want to deploy `chong` on `rob` as well. But if I go to the add new deploy key screen for repository `chong` on github, and paste in the public key I generated on `rob` it says `key already in use`. I thought, if they key was in use, I could clone `chong` on `rob` but that says permission denied.

So clearly this is more complicated than I thought and it involves having multiple keys or something. What should I do to clone `chong` on `rob`?

Thank you for your help.