diff --git a/src/jlgraphic/app/JlDrawApp.ts b/src/jlgraphic/app/JlDrawApp.ts
index 25ef784..78040c7 100644
--- a/src/jlgraphic/app/JlDrawApp.ts
+++ b/src/jlgraphic/app/JlDrawApp.ts
@@ -523,8 +523,12 @@ export class JlDrawApp extends GraphicApp implements IDrawApp {
    */
   bindFormData(form: GraphicData): void {
     this.formData = form;
-    if (this.selectedGraphics.length == 1) {
-      this.formData.copyFrom(this.selectedGraphics[0].saveData());
+    if (this.formData && this.selectedGraphics.length == 1) {
+      if (this.formData.graphicType == this.selectedGraphics[0].type) {
+        this.formData.copyFrom(this.selectedGraphics[0].saveData());
+      } else {
+        this.formData = undefined;
+      }
     }
   }