diff --git a/routes/(apps)/mobility/(_islands)/EditMobility.tsx b/routes/(apps)/mobility/(_islands)/EditMobility.tsx
index ef3a485..8991926 100644
--- a/routes/(apps)/mobility/(_islands)/EditMobility.tsx
+++ b/routes/(apps)/mobility/(_islands)/EditMobility.tsx
@@ -240,7 +240,7 @@ export default function EditMobility() {
           </table>
         </div>
       ))}
-      <button onClick={handleSave} disabled={isSaving}>
+      <button type="button" onClick={handleSave} disabled={isSaving}>
         {isSaving ? "Saving..." : "Confirm"}
       </button>
     </section>
diff --git a/routes/(apps)/students/(_components)/Promotion.tsx b/routes/(apps)/students/(_components)/Promotion.tsx
index 985b637..8a6394f 100644
--- a/routes/(apps)/students/(_components)/Promotion.tsx
+++ b/routes/(apps)/students/(_components)/Promotion.tsx
@@ -22,7 +22,7 @@ export default function Promotion(props: PromotionProps) {
         <tbody>
           {props.students
             .filter((student) => student.promotionId === props.promo.id)
-            .map((student) => <Student student={student} />)}
+            .map((student) => <Student key={student.id} student={student} />)}
         </tbody>
       </table>
     </div>
diff --git a/routes/(apps)/students/(_islands)/UploadStudents.tsx b/routes/(apps)/students/(_islands)/UploadStudents.tsx
index 1ae11d7..6e21876 100644
--- a/routes/(apps)/students/(_islands)/UploadStudents.tsx
+++ b/routes/(apps)/students/(_islands)/UploadStudents.tsx
@@ -104,7 +104,7 @@ export default function UploadStudents() {
   return (
     <>
       <input type="file" accept=".xlsx, .xls" onChange={handleFileChange} />
-      <button onClick={confirmUpload}>Confirm Upload</button>
+      <button type="button" onClick={confirmUpload}>Confirm Upload</button>
       <p>{statusMessage.value}</p>
     </>
   );