diff --git a/ui/src/components/plot/SVGSettingPanel.vue b/ui/src/components/plot/SVGSettingPanel.vue
index 53099dcfa..15782d71d 100644
--- a/ui/src/components/plot/SVGSettingPanel.vue
+++ b/ui/src/components/plot/SVGSettingPanel.vue
@@ -445,7 +445,7 @@ export default {
             this.setG(svg, g);
             break;
         }
-        if(parts[i].getAttribute("id") === this.prevSvg.getAttribute("id")) {
+        if(parts[i] && this.prevSvg && parts[i].getAttribute("id") === this.prevSvg.getAttribute("id")) {
           this.removeHighLight(svg.children[svg.children.length - 1]);
         }
       }