diff --git a/editor/plugins/navigation_obstacle_3d_editor_plugin.cpp b/editor/plugins/navigation_obstacle_3d_editor_plugin.cpp
index 9747ef4d4879..5118f1d4585a 100644
--- a/editor/plugins/navigation_obstacle_3d_editor_plugin.cpp
+++ b/editor/plugins/navigation_obstacle_3d_editor_plugin.cpp
@@ -503,7 +503,11 @@ void NavigationObstacle3DEditor::edit(Node *p_node) {
 		wip.clear();
 		wip_active = false;
 		edited_point = -1;
-		p_node->add_child(point_lines_meshinstance);
+		if (point_lines_meshinstance->get_parent()) {
+			point_lines_meshinstance->reparent(p_node, false);
+		} else {
+			p_node->add_child(point_lines_meshinstance);
+		}
 		_polygon_draw();
 
 	} else {