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reactjs - React NextJS Firebase error refresh Firebase App named '[DEFAULT]' already exists

I started a project and occurred an error when importing firebase in more than one component.

In this firebase start file:

import firebase from 'firebase'
const firebaseConfig = {
  apiKey: "fdsfsdfdsf",
  authDomain: "fdsfdsfsdfdsf",
  databaseURL: "sdfdsfdsf",
  projectId: "dsfdsfdsf",
  storageBucket: "dsfdsfdsf",
  messagingSenderId: "dsfdsfsdfdsf"
}

const FbApp = firebase.initializeApp(firebaseConfig)

export default FbApp.auth()

Then in the components:

import firebase from '../lib/firebaseClient'

With a single component works well, but if I add a new component with:

import firebase from '../lib/firebaseClient' 

The application fail:

FirebaseError: Firebase: Firebase App named '[DEFAULT]' already exists (app/duplicate-app).

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