Unresolved package "generated" in AndroidManifest.xml

In my Android Studio androidManifest.xml file, I found an unresolved package generated. How can I fix it?

The issued code is : android:name=".provider.generated.SquawkProvider

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.aaa">

<uses-permission android:name="android.permission.INTERNET" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

<activity
    android:name=".MainActivity">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

<provider
    android:name=".provider.generated.SquawkProvider"
     <!--  shows unresolved package "generated" -->

    android:authorities="com.example.android.aaa.provider.provider"
    android:exported="false" >
</provider>

<activity
    android:name=".following.FollowingPreferenceActivity"
    android:parentActivityName=".MainActivity">
    <meta-data
        android:name="android.support.PARENT_ACTIVITY"
        android:value=".MainActivity" />
</activity>

<service
    android:name=".fcm.MyFirebaseMessagingService">
    <intent-filter>
        <action android:name="com.google.firebase.MESSAGING_EVENT"/>
    </intent-filter>
</service>

</application>
</manifest>