diff --git a/backend/src/api/members/routes.js b/backend/src/api/members/routes.js
index d846e00..54b2c3a 100644
--- a/backend/src/api/members/routes.js
+++ b/backend/src/api/members/routes.js
@@ -36,7 +36,7 @@ module.exports = {
 
     const member = await controller.create(req.db, data);
 
-    if (!member) return res.sendStatus(400); // Duplicate user
+    if (!member) return res.sendStatus(409); // Duplicate user
     res.json(member);
   },
 
@@ -67,10 +67,13 @@ module.exports = {
     } catch (e) {
       return res.sendStatus(400);
     }
-
-    const member = await controller.update(req.db, id, data);
-
-    if (!member) return res.sendStatus(404);
-    res.json(member);
+    try {
+      const member = await controller.update(req.db, id, data);
+      if (!member) return res.sendStatus(404);
+      res.json(member);
+    } catch (e) {
+      if (e.code === 'ER_DUP_ENTRY') return res.sendStatus(409);
+      else throw e;
+    }
   },
 };
diff --git a/frontend/src/api/httpClient.js b/frontend/src/api/httpClient.js
index cc8634a..d301e7a 100644
--- a/frontend/src/api/httpClient.js
+++ b/frontend/src/api/httpClient.js
@@ -48,6 +48,14 @@ const errorInterceptor = (error) => {
       router.push('login');
       break;
 
+    case 409:
+      Vue.notify({
+        type: 'warn',
+        title: 'Duplicate Entry',
+        text: 'The server rejected the request',
+      });
+      break;
+
     case 500:
       console.error(error.response.status, error.message);
       Vue.notify({