ConstraintLayout não permite imageView dentro

Boa noite Pessoal, estou na parte 4 aula 6 e estou utilizando a cardview, quando realizei essa atividade tive que colocar um constraint layout dentro do meu constraint layout porém ao fazer isso estou tomando o erro abaixo.

@+id/item_pacote_imgFotoCidade is not a sibling in the same ConstraintLayout Layout constraints in a given ConstraintLayout or RelativeLayout should reference other views within the same relative layout (but not itself!) Issue id: NotSibling

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools">

<android.support.v7.widget.CardView
    android:id="@+id/item_pacote_cardView"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_margin="8dp"
    app:layout_constraintBottom_toTopOf="@+id/item_pacote_imgFotoCidade"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ImageView
            android:id="@+id/item_pacote_imgFotoCidade"
            android:layout_width="0dp"
            android:layout_height="100dp"
            android:scaleType="centerCrop"
            android:src="@drawable/recife_pe"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.0" />

        <TextView
            android:id="@+id/item_pacote_txtValor"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="R$ 249,99"
            android:textColor="@android:color/holo_green_dark"
            android:textSize="20sp"
            android:textStyle="bold"
            app:layout_constraintStart_toStartOf="@id/item_pacote_txt2Dias"
            app:layout_constraintTop_toBottomOf="@id/item_pacote_txt2Dias" />

        <View
            android:id="@+id/item_pacote_viewDivisor"
            android:layout_width="0dp"
            android:layout_height="3dp"
            android:background="@android:color/holo_orange_dark"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/item_pacote_imgFotoCidade" />

        <TextView
            android:id="@+id/item_pacote_txtNomeCidade"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:background="@android:drawable/screen_background_dark_transparent"
            android:padding="8dp"
            android:text="Recife"
            android:textColor="@android:color/white"
            android:textSize="14sp"
            android:textStyle="bold"
            app:layout_constraintBottom_toBottomOf="@+id/item_pacote_imgFotoCidade"
            app:layout_constraintEnd_toEndOf="@+id/item_pacote_imgFotoCidade"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="@+id/item_pacote_imgFotoCidade"
            app:layout_constraintTop_toTopOf="@+id/item_pacote_imgFotoCidade"
            app:layout_constraintVertical_bias="1.0" />

        <TextView
            android:id="@+id/item_pacote_txt2Dias"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:text="2 Dias"
            android:textSize="16sp"
            android:textStyle="bold"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/item_pacote_viewDivisor" />
    </android.support.constraint.ConstraintLayout>

</android.support.v7.widget.CardView>

</android.support.constraint.ConstraintLayout>