update：更新

src/components/app-panel-field/app-panel-field.vue

@@ -69,7 +69,7 @@ export default class AppPanelField extends Vue {
    * @memberof AppPanelField
    */
   get itemName() {
-    return this.index ? `${this.name}_${this.index}` : this.name;
+    return (this.index || this.index === 0) ? `${this.name}_${this.index}` : this.name;
   }
 
   /**