diff --git a/src/VendorLocker/ParentClassMethodTypeOverrideGuard.php b/src/VendorLocker/ParentClassMethodTypeOverrideGuard.php
index 43ceebfbdc6..3d82bf09911 100644
--- a/src/VendorLocker/ParentClassMethodTypeOverrideGuard.php
+++ b/src/VendorLocker/ParentClassMethodTypeOverrideGuard.php
@@ -28,6 +28,11 @@ public function __construct(
 
     public function hasParentClassMethod(ClassMethod|MethodReflection $classMethod): bool
     {
+        // early got false on private method
+        if ($classMethod->isPrivate()) {
+            return false;
+        }
+
         try {
             $parentClassMethod = $this->resolveParentClassMethod($classMethod);