Failed to install 'cordova-plugin-firebase': CordovaError: Uh oh

I had follow these steps to install an configure firebase to my cordova project for cloud messaging.
https://medium.com/@felipepucinelli/how-to-add-push-notifications-in-your-cordova-application-using-firebase-69fac067e821 />


I have the google-services.json file and added into root path of my project. To install cordova-plugin-firebase, I tried to paste :






into config.xml and run cordova platform add android@6.4.0 .



Output :

Installing "cordova-plugin-firebase" for android
Error during processing of action! Attempting to revert...
Failed to install 'cordova-plugin-firebase': CordovaError: Uh oh!
"C:\Users\myAppName\application\platforms\android\google-services.json" already exists!




EDIT:
Tried step by step :

cordova platform rm android

cordova plugin rm cordova-plugin-firebase --save

cordova plugins
com.unarin.cordova.beacon 3.6.1 "Proximity Beacon Plugin"
cordova-open-native-settings 1.5.1 "Native settings"
cordova-plugin-badge 0.8.7 "Badge"
cordova-plugin-barcodescanner 0.7.4 "BarcodeScanner"
cordova-plugin-bluetoothle 4.4.3 "Bluetooth LE"
cordova-plugin-call-number 1.0.1 "Cordova Call Number Plugin"
cordova-plugin-compat 1.2.0 "Compat"
cordova-plugin-device 2.0.2 "Device"
cordova-plugin-dialogs 2.0.1 "Notification"
cordova-plugin-email 1.2.7 "EmailComposer"
cordova-plugin-geolocation 4.0.1 "Geolocation"
cordova-plugin-inappbrowser 3.0.0 "InAppBrowser"
cordova-plugin-network-information 2.0.1 "Network Information"
cordova-plugin-open-blank 0.0.2 "Open Blank"
cordova-plugin-splashscreen 5.0.3-dev "Splashscreen"
cordova-plugin-whitelist 1.3.3 "Whitelist"
cordova-plugin-x-socialsharing 5.4.0 "SocialSharing"
cordova.plugins.diagnostic 4.0.6 "Diagnostic"
es6-promise-plugin 4.2.2 "Promise"

cordova platform add android@6.4.0

cordova plugin add cordova-plugin-firebase --save
Installing "cordova-plugin-firebase" for android
Error during processing of action! Attempting to revert...
Failed to install 'cordova-plugin-firebase': CordovaError: Uh oh!
"C:\Users\myProject\application\platforms\android\res\values\colors.xml" already exists!
at copyNewFile (C:\Users\myProject\application\platforms\android\cordova\lib\pluginHandlers.js:245:45)
at install (C:\Users\myProject\application\platforms\android\cordova\lib\pluginHandlers.js:43:17)
at ActionStack.process (C:\Users\myProject\application\platforms\android\cordova\node_modules\cordova-common\src\ActionStack.js:56:25)
at PluginManager.doOperation (C:\Users\myProject\application\platforms\android\cordova\node_modules\cordova-common\src\PluginManager.js:114:20)
at PluginManager.addPlugin (C:\Users\myProject\application\platforms\android\cordova\node_modules\cordova-common\src\PluginManager.js:144:17)
at C:\Users\myProject\application\platforms\android\cordova\Api.js:243:74
at _fulfilled (C:\Users\myProject\application\platforms\android\cordova\node_modules\q\q.js:854:54)
at self.promiseDispatch.done (C:\Users\myProject\application\platforms\android\cordova\node_modules\q\q.js:883:30)
at Promise.promise.promiseDispatch (C:\Users\myProject\application\platforms\android\cordova\node_modules\q\q.js:816:13)
at C:\Users\myProject\application\platforms\android\cordova\node_modules\q\q.js:570:49
Uh oh!
"C:\Users\myProject\application\platforms\android\res\values\colors.xml" already exists!




I don't understant what's wrong...