diff --git a/backend/helper/seeder.helper.js b/backend/helper/seeder.helper.js
index 0b7182f..2b98080 100644
--- a/backend/helper/seeder.helper.js
+++ b/backend/helper/seeder.helper.js
@@ -32,10 +32,12 @@ const createUsers = async (queryInterface, roles, users) => {
     }, {});
 
     const createdUsers = await queryInterface.select(null, 'Users');
-    const userRoles = users.flatMap(user => user.roles.map(role => ({
-        id: createdUsers.find(user => user.firstName === user.firstName && user.lastName === user.lastName).id,
-        role: rolesByName[role]
-    })));
+    const userRoles = users.flatMap(user => {
+        return user.roles.map(role => ({
+            id: createdUsers.find(createdUser => createdUser.firstName === user.firstName && createdUser.lastName === user.lastName).id,
+            role: rolesByName[role]
+        }));
+    });
 
     // Create UserRoles
     await queryInterface.bulkInsert('UserRoles', userRoles.map(userRole => {