npm run dev 오류 (server)

[0] (node:10908) Warning: Accessing non-existent property 'count' of module exports inside circular dependency
[0] (Use `node --trace-warnings ...` to show where the warning was created)
[0] (node:10908) Warning: Accessing non-existent property 'findOne' of module exports inside circular dependency
[0] (node:10908) Warning: Accessing non-existent property 'remove' of module exports inside circular dependency
[0] (node:10908) Warning: Accessing non-existent property 'updateOne' of module exports inside circular dependency
[0] events.js:292
[0] throw er; // Unhandled 'error' event
[0] ^
[0]
[0] Error: listen EADDRINUSE: address already in use :::5000
[0] at Server.setupListenHandle [as _listen2] (net.js:1318:16)
[0] at listenInCluster (net.js:1366:12)
[0] at Server.listen (net.js:1452:7)
[0] at Function.listen (C:\Users\jimin\Downloads\boilerplate-mern-stack-master\boilerplate-mern-stack-master\node_modules\express\lib\application.js:618:24)
[0] at Object.<anonymous> (C:\Users\jimin\Downloads\boilerplate-mern-stack-master\boilerplate-mern-stack-master\server\index.js:58:5)
[0] at Module._compile (internal/modules/cjs/loader.js:1063:30)
[0] at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
[0] at Module.load (internal/modules/cjs/loader.js:928:32)
[0] at Function.Module._load (internal/modules/cjs/loader.js:769:14)
[0] at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
[0] at internal/main/run_main_module.js:17:47
[0] Emitted 'error' event on Server instance at:

[0] at emitErrorNT (net.js:1345:8)

[0] at processTicksAndRejections (internal/process/task_queues.js:80:21) {
[0] code: 'EADDRINUSE',
[0] errno: -4091,
[0] syscall: 'listen',
[0] address: '::',
[0] port: 5000
[0] }
[0] [nodemon] app crashed - waiting for file changes before starting...

이렇게 오류가 납니다. localhost:3000 포트에서는 정상적으로 잘 작동이 되더만, localhost:5000 포트에서는 Error Cannot GET /가 뜹니다. 왜 이런걸까요? ㅠ

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