I mean, it's kinda nice to know that if you reissue a request for an instance that could costs thousands of dollars per month due to a network glitch that you w

I mean, it's kinda nice to know that if you reissue a request for an instance that could costs thousands of dollars per month due to a network glitch that you won't accidentally create two of them? More practically, though, the instance name here is literally the name of the instance as it appears in the RESTful URL used for future queries about it. The 409 here is rejecting an attempt to create the same explicitly named resource twice.