fix

src/ui/view/MyCanvas.java

@@ -381,6 +381,7 @@ class MyCanvas extends JPanel implements MouseListener, MouseMotionListener {
 				node = false;
 
 				CpsNode n = new CpsNode("Node");
+				n.setID(idCounter.nextId());
 				n.setPosition(x - model.getScaleDiv2(), y - model.getScaleDiv2());
 				controller.addObjectCanvas(n);