bug

src/components/preferential/index.js

@@ -83,7 +83,7 @@ class Preferential extends Component {
     toCourseDetail = (id) => {
         const { dispatch, history } = this.props;
         // dispatch(getCourses(id, () => {
-            history.push(`/detail?id=${id}`)
+            history.replace(`/detail?id=${id}`)
         // }));
     }