diff --git a/src/components/knockGold/index.jsx b/src/components/knockGold/index.jsx
index 39377c72..adedad65 100644
--- a/src/components/knockGold/index.jsx
+++ b/src/components/knockGold/index.jsx
@@ -378,7 +378,7 @@ export default class addKnockGold extends Component {
       natural_limit: this.state.model.natural_limit,
       brush_limit: this.state.model.brush_limit,
       instruction: this.state.model.instruction,
-      early_per: this.state.model.early_per,
+      early_per: this.state.model.early_per.filter((item) => item),
       early_notifier: this.state.model.early_notifier.map(({ text, key }) => ({
         real_name: text,
         mobile: key