From 2c541a782be76d41c6dde057257c0ab15d58a104 Mon Sep 17 00:00:00 2001
From: Rajib Quayum <rajibq@users.noreply.github.com>
Date: Fri, 3 Apr 2026 09:29:06 -0400
Subject: [PATCH] fix: prevent occasional duplication of the MUI v5 prefix

Signed-off-by: Rajib Quayum <rajibq@users.noreply.github.com>
---
 packages/theme/src/unified/UnifiedThemeProvider.tsx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/theme/src/unified/UnifiedThemeProvider.tsx b/packages/theme/src/unified/UnifiedThemeProvider.tsx
index 69d843ed3e..f10320393d 100644
--- a/packages/theme/src/unified/UnifiedThemeProvider.tsx
+++ b/packages/theme/src/unified/UnifiedThemeProvider.tsx
@@ -47,6 +47,9 @@ export interface UnifiedThemeProviderProps {
  * This call needs to be in the same module as the `UnifiedThemeProvider` to ensure that it doesn't get removed by tree shaking
  */
 ClassNameGenerator.configure(componentName => {
+  if ((componentName ?? '').startsWith('v5-')) {
+    return componentName;
+  }
   return `v5-${componentName}`;
 });