Hey @CallieAlreza !
Thank you for posting on the Instructure Community!
While I could be wrong about this, I am almost posititve that this is only available for when you're updating full course shells. I think canvas commons knows when you're sharing / updating the same course because it takes the ID of that course and checks it. With modules, though, they don't have a unique identification like that, since modules are something that allow you to organize your course content and resources, and don't have an actual ID number specific to them.
That being said, I don't think you can just update a module with the same resource.
I hope this helps a bit,
Noah