diff --git a/ui/src/components/study/ProblemList.vue b/ui/src/components/study/ProblemList.vue
index 48c6f4f..7641d23 100644
--- a/ui/src/components/study/ProblemList.vue
+++ b/ui/src/components/study/ProblemList.vue
@@ -170,8 +170,8 @@ const editedItem = ref({
 });
 const defaultItem = ref({
   id: 0,
-  problem: '1',
-  answer: '1',
+  problem: '',
+  answer: '',
   check_error: 0,
 });