Dragging QPixmaps inside QGraphicsScene: how to avoid 'auto' not allowed in lambda parameter

I am trying to implement a custom QGraphicsScene, and when we press the left key, it allows dragging an item, for which I use QDrag and pass the item data, then I overwrite the dropEvent event where I get element and dropEvent new parent. I think that QGraphicsPixmapItem on top of another item could be tricky, so maybe the best option is to set it as the parentItem.

However, I get the following error 'auto' not allowed in lambda parameter and don't know exactly why

graphicsscene.h

protected:
    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;

graphicsscene.cpp

void GraphicsScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    auto its =  items(QRectF(event->scenePos() - QPointF(1,1), QSize(3,3)));
    auto val = std::find_if(its.constBegin(), its.constEnd(), [](auto const& it){ // <-- ERROR HERE
        return it->type() > QGraphicsItem::UserType;
    });
    if(val == its.constEnd())
        return;
    if(event->button() == Qt::RightButton){
        showContextMenu(event->scenePos());
    }
    else{
        createDrag(event->scenePos(), event->widget(), *val);
    }
}

Thanks for any insight about this.