diff --git a/apps/admin-x-settings/src/components/settings/site/ThemeModal.tsx b/apps/admin-x-settings/src/components/settings/site/ThemeModal.tsx
index 21aad85d7a..59bbe85229 100644
--- a/apps/admin-x-settings/src/components/settings/site/ThemeModal.tsx
+++ b/apps/admin-x-settings/src/components/settings/site/ThemeModal.tsx
@@ -92,13 +92,13 @@ const ThemeToolbar: React.FC<ThemeToolbarProps> = ({
         const existingThemeNames = themes.map(t => t.name);
         if (isDefaultOrLegacyTheme({name: themeFileName})) {
             NiceModal.show(ConfirmationModal, {
-                title: 'Cannot overwrite theme',
+                title: 'Upload failed',
                 cancelLabel: 'Cancel',
                 okLabel: '',
                 prompt: (
                     <>
-                        <p>Sorry, <strong>{themeFileName}</strong> is a default theme and cannot be overwritten.</p>
-                        <p>Please rename your zip file and try again.</p>
+                        <p>The default <strong>{themeFileName}</strong> theme cannot be overwritten.</p>
+                        <p>Rename your zip file and try again.</p>
                     </>
                 ),
                 onOk: async (confirmModal) => {
diff --git a/apps/admin-x-settings/test/acceptance/site/theme.test.ts b/apps/admin-x-settings/test/acceptance/site/theme.test.ts
index 6dbcbe44d1..bcaf610fa9 100644
--- a/apps/admin-x-settings/test/acceptance/site/theme.test.ts
+++ b/apps/admin-x-settings/test/acceptance/site/theme.test.ts
@@ -243,6 +243,6 @@ test.describe('Theme settings', async () => {
         const fileChooser = await fileChooserPromise;
         await fileChooser.setFiles(`${__dirname}/../../utils/responses/source.zip`);
 
-        await expect(page.getByTestId('confirmation-modal')).toHaveText(/Cannot overwrite theme/);
+        await expect(page.getByTestId('confirmation-modal')).toHaveText(/Upload failed/);
     });
 });