diff --git a/mobile/Components/BookInfoModalReview/BookInfoModalReview.tsx b/mobile/Components/BookInfoModalReview/BookInfoModalReview.tsx
index 37a6b74d..c762f0b1 100644
--- a/mobile/Components/BookInfoModalReview/BookInfoModalReview.tsx
+++ b/mobile/Components/BookInfoModalReview/BookInfoModalReview.tsx
@@ -59,7 +59,7 @@ export const BookInfoModalReview = ({ bookInfo, navigation }) => {
           <FlatList
             data={data}
             showsVerticalScrollIndicator={false}
-            keyExtractor={(item) => item.user_id}
+            keyExtractor={(item) => item.$id}
             ListHeaderComponent={() => (
               <View
                 style={{