diff --git a/frontend/src/components/FillModal.jsx b/frontend/src/components/FillModal.jsx
index e6a0c31..35afec2 100644
--- a/frontend/src/components/FillModal.jsx
+++ b/frontend/src/components/FillModal.jsx
@@ -182,9 +182,9 @@ export default function FillModal({ template, onSubmit, onClose }) {
       }
       return {
         step_id: s.id,
-        value,
-        is_checked: s.type === 'checkbox' ? (values[s.id] ? 1 : 0) : 0,
-        file_path: null,
+        value: value || '',
+        is_checked: s.type === 'checkbox' ? !!values[s.id] : false,
+        file_path: undefined,
       };
     });