diff --git a/share/qtcreator/qmldesigner/collectionEditorQmlSource/NewCollectionDialog.qml b/share/qtcreator/qmldesigner/collectionEditorQmlSource/NewCollectionDialog.qml
index bfe985a0f52..50ae55ab722 100644
--- a/share/qtcreator/qmldesigner/collectionEditorQmlSource/NewCollectionDialog.qml
+++ b/share/qtcreator/qmldesigner/collectionEditorQmlSource/NewCollectionDialog.qml
@@ -19,10 +19,7 @@ StudioControls.Dialog {
     required property var backendValue
     required property var sourceModel
 
-    readonly property alias collectionType: typeMode.collectionType
     readonly property bool isValid: collectionName.isValid
-                                    && jsonCollections.isValid
-                                    && newCollectionPath.isValid
 
     title: qsTr("Add a new Model")
     anchors.centerIn: parent
@@ -31,8 +28,6 @@ StudioControls.Dialog {
 
     onOpened: {
         collectionName.text = qsTr("Model")
-        updateType()
-        updateJsonSourceIndex()
         updateCollectionExists()
     }
 
@@ -41,52 +36,12 @@ StudioControls.Dialog {
     }
 
     onAccepted: {
-        if (root.isValid) {
-            root.backendValue.addCollection(collectionName.text,
-                                            root.collectionType,
-                                            newCollectionPath.text,
-                                            jsonCollections.currentValue)
-
-        }
-    }
-
-    function updateType() {
-        newCollectionPath.text = ""
-        if (typeMode.currentValue === NewCollectionDialog.SourceType.NewJson) {
-            newCollectionFileDialog.nameFilters = ["JSON Files (*.json)"]
-            newCollectionFileDialog.fileMode = PlatformWidgets.FileDialog.SaveFile
-            newCollectionPath.enabled = true
-            jsonCollections.enabled = false
-            typeMode.collectionType = "json"
-        } else if (typeMode.currentValue === NewCollectionDialog.SourceType.NewCsv) {
-            newCollectionFileDialog.nameFilters = ["Comma-Separated Values (*.csv)"]
-            newCollectionFileDialog.fileMode = PlatformWidgets.FileDialog.SaveFile
-            newCollectionPath.enabled = true
-            jsonCollections.enabled = false
-            typeMode.collectionType = "csv"
-        } else if (typeMode.currentValue === NewCollectionDialog.SourceType.ExistingCollection) {
-            newCollectionFileDialog.nameFilters = ["All Model Group Files (*.json *.csv)",
-                                                   "JSON Files (*.json)",
-                                                   "Comma-Separated Values (*.csv)"]
-            newCollectionFileDialog.fileMode = PlatformWidgets.FileDialog.OpenFile
-            newCollectionPath.enabled = true
-            jsonCollections.enabled = false
-            typeMode.collectionType = "existing"
-        }
-    }
-
-    function updateJsonSourceIndex() {
-        if (!jsonCollections.enabled) {
-            jsonCollections.currentIndex = -1
-            return
-        }
-
-        if (jsonCollections.currentIndex === -1 && jsonCollections.model.rowCount())
-            jsonCollections.currentIndex = 0
+        if (root.isValid)
+            root.backendValue.addCollectionToDataStore(collectionName.text);
     }
 
     function updateCollectionExists() {
-        collectionName.alreadyExists = sourceModel.collectionExists(jsonCollections.currentValue,
+        collectionName.alreadyExists = sourceModel.collectionExists(backendValue.dataStoreNode(),
                                                                     collectionName.text)
     }
 
@@ -114,117 +69,6 @@ StudioControls.Dialog {
     contentItem: ColumnLayout {
         spacing: 5
 
-        NameField {
-            text: qsTr("Type")
-        }
-
-        StudioControls.ComboBox {
-            id: typeMode
-
-            property string collectionType
-
-            Layout.minimumWidth: 300
-            Layout.fillWidth: true
-
-            model: ListModel {
-                ListElement { text: qsTr("New JSON model group"); value: NewCollectionDialog.SourceType.NewJson}
-                ListElement { text: qsTr("New CSV model"); value: NewCollectionDialog.SourceType.NewCsv}
-                ListElement { text: qsTr("Import an existing model group"); value: NewCollectionDialog.SourceType.ExistingCollection}
-            }
-
-            textRole: "text"
-            valueRole: "value"
-            actionIndicatorVisible: false
-
-            onCurrentValueChanged: root.updateType()
-        }
-
-        Spacer {}
-
-        RowLayout {
-            visible: newCollectionPath.enabled
-
-            NameField {
-                text: qsTr("File location")
-                visible: newCollectionPath.enabled
-            }
-
-            Text {
-                id: newCollectionPath
-
-                readonly property bool isValid: !newCollectionPath.enabled || newCollectionPath.text !== ""
-
-                Layout.fillWidth: true
-                Layout.alignment: Qt.AlignRight | Qt.AlignVCenter
-                elide: Text.ElideRight
-                font.family: StudioTheme.Constants.font.family
-                font.pixelSize: StudioTheme.Values.baseIconFontSize
-                color: StudioTheme.Values.themePlaceholderTextColor
-            }
-
-            HelperWidgets.Button {
-                Layout.alignment: Qt.AlignLeft | Qt.AlignVCenter
-                text: qsTr("Select")
-
-                onClicked: newCollectionFileDialog.open()
-
-                PlatformWidgets.FileDialog {
-                    id: newCollectionFileDialog
-
-                    title: qsTr("Select source file")
-                    fileMode: PlatformWidgets.FileDialog.OpenFile
-                    acceptLabel: newCollectionFileDialog.fileMode === PlatformWidgets.FileDialog.OpenFile
-                                    ? qsTr("Open")
-                                    : qsTr("Add")
-
-                    onAccepted: newCollectionPath.text = newCollectionFileDialog.currentFile
-                }
-            }
-        }
-
-        ErrorField {
-            visible: !newCollectionPath.isValid
-            text: qsTr("Select a file to continue")
-        }
-
-        Spacer { visible: newCollectionPath.enabled }
-
-        NameField {
-            text: qsTr("JSON model group")
-            visible: jsonCollections.enabled
-        }
-
-        StudioControls.ComboBox {
-            id: jsonCollections
-
-            readonly property bool isValid: !jsonCollections.enabled || jsonCollections.currentIndex !== -1
-
-            Layout.fillWidth: true
-
-            implicitWidth: 300
-            textRole: "sourceName"
-            valueRole: "sourceNode"
-            visible: jsonCollections.enabled
-            actionIndicatorVisible: false
-
-            model: CollectionJsonSourceFilterModel {
-                sourceModel: root.sourceModel
-                onRowsInserted: root.updateJsonSourceIndex()
-                onModelReset: root.updateJsonSourceIndex()
-                onRowsRemoved: root.updateJsonSourceIndex()
-            }
-
-            onEnabledChanged: root.updateJsonSourceIndex()
-            onCurrentValueChanged: root.updateCollectionExists()
-        }
-
-        ErrorField {
-            visible: !jsonCollections.isValid
-            text: qsTr("Add a JSON resource to continue")
-        }
-
-        Spacer {visible: jsonCollections.visible }
-
         NameField {
             text: qsTr("The model name")
             visible: collectionName.enabled
diff --git a/src/plugins/qmldesigner/components/collectioneditor/collectionwidget.cpp b/src/plugins/qmldesigner/components/collectioneditor/collectionwidget.cpp
index 2aae651c4ee..7e5d4268302 100644
--- a/src/plugins/qmldesigner/components/collectioneditor/collectionwidget.cpp
+++ b/src/plugins/qmldesigner/components/collectioneditor/collectionwidget.cpp
@@ -314,6 +314,26 @@ bool CollectionWidget::importCollectionToDataStore(const QString &collectionName
     return false;
 }
 
+bool CollectionWidget::addCollectionToDataStore(const QString &collectionName)
+{
+    const ModelNode node = dataStoreNode();
+    if (!node.isValid()) {
+        warn(tr("Can not import to the main model"), tr("The default model node is not available."));
+        return false;
+    }
+
+    QString errorMsg;
+    bool added = m_sourceModel->addCollectionToSource(node,
+                                                      generateUniqueCollectionName(node,
+                                                                                   collectionName),
+                                                      CollectionEditor::defaultCollectionArray(),
+                                                      &errorMsg);
+    if (!added)
+        warn(tr("Failed to add a model to the default model group"), errorMsg);
+
+    return added;
+}
+
 void CollectionWidget::assignSourceNodeToSelectedItem(const QVariant &sourceNode)
 {
     ModelNode sourceModel = sourceNode.value<ModelNode>();
diff --git a/src/plugins/qmldesigner/components/collectioneditor/collectionwidget.h b/src/plugins/qmldesigner/components/collectioneditor/collectionwidget.h
index 142fe9fbd51..03cf49aa7e3 100644
--- a/src/plugins/qmldesigner/components/collectioneditor/collectionwidget.h
+++ b/src/plugins/qmldesigner/components/collectioneditor/collectionwidget.h
@@ -50,6 +50,8 @@ public:
 
     Q_INVOKABLE bool importCollectionToDataStore(const QString &collectionName, const QUrl &url);
 
+    Q_INVOKABLE bool addCollectionToDataStore(const QString &collectionName);
+
     Q_INVOKABLE void assignSourceNodeToSelectedItem(const QVariant &sourceNode);
 
     Q_INVOKABLE ModelNode dataStoreNode() const;