manifest merger failed

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.zip23.twice">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Twice">
        <activity android:name=".SplashActivity">

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

        </activity>
        <activity android:name=".MainActivity">

        </activity>
    </application>



트와이스 앱 만들기 중인데

manifest merger failed: android:exported needs to be explicitly specified for
이라고 뜨면서 test device 작동이 안됩니다.

코드를 똑같이 작성한 거 같은데 어디서 문제가 생긴걸까요?
항상 답변 해주셔서 감사합니다!

</manifest>