Android ionic-plugin-keyboard already exists

Im trying to add an Android platform to my project, but when i run ionic cordova platform add android im getting this error:

Subproject Path: app
Installing “ionic-plugin-keyboard” for android
Error during processing of action! Attempting to revert…
Failed to install ‘ionic-plugin-keyboard’: CordovaError: Uh oh!
“…/platforms/android/app/src/main/java/io/ionic/keyboard/” already exists!

Why is this happening? I dont have any ionic-plugin-keyboard on my package.json or config.xml.