#3 에서 에러가 발생합니다...

byeongukan@anbyeong-ug-ui-MacBookPro boiler-plate % yarn start

yarn run v1.22.4

$ node index.js

events.js:292

      throw er; // Unhandled 'error' event

      ^

Error: listen EADDRINUSE: address already in use :::5000

    at Server.setupListenHandle [as _listen2] (net.js:1313:16)

    at listenInCluster (net.js:1361:12)

    at Server.listen (net.js:1447:7)

    at Function.listen (/Users/byeongukan/Documents/boiler-plate/node_modules/express/lib/application.js:618:24)

    at Object.<anonymous> (/Users/byeongukan/Documents/boiler-plate/index.js:23:5)

    at Module._compile (internal/modules/cjs/loader.js:1137:30)

    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)

    at Module.load (internal/modules/cjs/loader.js:985:32)

    at Function.Module._load (internal/modules/cjs/loader.js:878:14)

    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)

    at internal/main/run_main_module.js:17:47

Emitted 'error' event on Server instance at:

    at emitErrorNT (net.js:1340:8)

    at processTicksAndRejections (internal/process/task_queues.js:84:21) {

  code: 'EADDRINUSE',

  errno: 'EADDRINUSE',

  syscall: 'listen',

  address: '::',

  port: 5000

}

error Command failed with exit code 1.

info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

byeongukan@anbyeong-ug-ui-MacBookPro boiler-plate % 

계속 에러가 뜨는데 왜 이런에러가 뜰까요 ㅠㅠ