nav구현중에 frament_home이 기본이 아니라 fragment_bookmark가 첫화면

nav구현중에 frament_home이 기본이 아니라 fragment_bookmark가 첫화면입니다.

어느부분을 봐야할까요?

main_nav.xml

<fragment
    android:id="@+id/homeFragment"
    android:name="com.bokchi.mysolelife.fragments.HomeFragment"
    android:label="fragment_home"
    tools:layout="@layout/fragment_home" >
    <action
        android:id="@+id/action_homeFragment_to_bookmarkFragment"
        app:destination="@id/bookmarkFragment" />
    <action
        android:id="@+id/action_homeFragment_to_storeFragment"
        app:destination="@id/storeFragment" />
    <action
        android:id="@+id/action_homeFragment_to_talkFragment"
        app:destination="@id/talkFragment" />
    <action
        android:id="@+id/action_homeFragment_to_tipFragment"
        app:destination="@id/tipFragment" />
</fragment>
<fragment
    android:id="@+id/bookmarkFragment"
    android:name="com.bokchi.mysolelife.fragments.BookmarkFragment"
    android:label="fragment_bookmark"
    tools:layout="@layout/fragment_bookmark" />

<fragment
    android:id="@+id/storeFragment"
    android:name="com.bokchi.mysolelife.fragments.StoreFragment"
    android:label="fragment_store"
    tools:layout="@layout/fragment_store" />
<fragment
    android:id="@+id/talkFragment"
    android:name="com.bokchi.mysolelife.fragments.TalkFragment"
    android:label="fragment_talk"
    tools:layout="@layout/fragment_talk" />
<fragment
    android:id="@+id/tipFragment"
    android:name="com.bokchi.mysolelife.fragments.TipFragment"
    android:label="fragment_tip"
    tools:layout="@layout/fragment_tip" />

입니다.

더 필요한 파일이있다면 답변부탁드립니다.