mouseEvent reaches other GraphicsItem than clicked on

[wyzryn]

Here's my implementation of mousePressEvent:

void Node::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    if(event->button()==Qt::RightButton){
    Owner owner(id);
    owner.exec();
    }
 
    if(event->button()==Qt::LeftButton){
        if(color == Qt::blue) color = Qt::red;
        else color = Qt::blue;
    }
}

void Node::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    if(event->button()==Qt::RightButton){
    Owner owner(id);
    owner.exec();
    }

    if(event->button()==Qt::LeftButton){
        if(color == Qt::blue) color = Qt::red;
        else color = Qt::blue;
    }
}

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Owner inherits QInputDialog and Node inherits QGraphicsItem.

The problem is that when I click on the first item, everything is just fine. The item that was hit changes color and I make some input.
But when I click on any other item it doesn't change color. The first one does instead.

What could cause the trouble?