diff --git a/web/src/components/users/FirstUserForm.jsx b/web/src/components/users/FirstUserForm.jsx
index 4cecfa12d0..94c9c36220 100644
--- a/web/src/components/users/FirstUserForm.jsx
+++ b/web/src/components/users/FirstUserForm.jsx
@@ -222,7 +222,6 @@ export default function FirstUserForm() {
                     className="first-username-wrapper"
                     fieldId="userName"
                     label={_("Username")}
-                    isRequired
                   >
                     <TextInput
                       id="userName"
diff --git a/web/src/components/users/utils.js b/web/src/components/users/utils.js
index ab982fba96..b13576d8b8 100644
--- a/web/src/components/users/utils.js
+++ b/web/src/components/users/utils.js
@@ -28,6 +28,8 @@
  * @returns {string[]} An array of username suggestions.
  */
 const suggestUsernames = (fullName) => {
+  if (!fullName) return [];
+
   // Cleaning the name.
   const cleanedName = fullName
     .normalize('NFD')
diff --git a/web/src/components/users/utils.test.js b/web/src/components/users/utils.test.js
index 1049e3b171..0c303e2803 100644
--- a/web/src/components/users/utils.test.js
+++ b/web/src/components/users/utils.test.js
@@ -24,6 +24,11 @@
 import { suggestUsernames } from "./utils";
 
 describe('suggestUsernames', () => {
+  test('returns empty collection if fullName not defined', () => {
+    expect(suggestUsernames(undefined)).toEqual([]);
+    expect(suggestUsernames(null)).toEqual([]);
+  });
+
   test('handles basic single name', () => {
     expect(suggestUsernames('John')).toEqual(expect.arrayContaining(['john']));
   });