MongoDB won't create a model!

In glitch I’m trying to create a model in myApp.js. I can’t make a personSchema because in the server.js (on line 69): “SyntaxError: Identifier Person has already been declared”.

If I change the words in myApp.js to something other than the word Person it runs, but it fails the challenge. I’ve already tried three other tutorials and I’m still stuck.

solution: https://nonchalant-scalloped-zydeco.glitch.me

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Challenge: Create a Model

Link to the challenge: