diff --git a/src/components/knockGold/index.jsx b/src/components/knockGold/index.jsx
index 02e43544..f0656ebd 100644
--- a/src/components/knockGold/index.jsx
+++ b/src/components/knockGold/index.jsx
@@ -427,7 +427,7 @@ export default class addKnockGold extends Component {
             end_time: this.state.model.fixed_time[1]
           },
           effect_day: this.state.model.effect_date,
-          effect_date_type: this.state.model.effect_date_type.key
+          effect_date_type: this.state.model.effect_date_type?.key
         }
       }
     }