diff --git a/Debug/TraceableEventDispatcher.php b/Debug/TraceableEventDispatcher.php
index d31ce75816..f3101d5b14 100644
--- a/Debug/TraceableEventDispatcher.php
+++ b/Debug/TraceableEventDispatcher.php
@@ -66,7 +66,11 @@ protected function afterDispatch(string $eventName, object $event): void
                 if (null === $sectionId) {
                     break;
                 }
-                $this->stopwatch->stopSection($sectionId);
+                try {
+                    $this->stopwatch->stopSection($sectionId);
+                } catch (\LogicException) {
+                    // The stop watch service might have been reset in the meantime
+                }
                 break;
             case KernelEvents::TERMINATE:
                 // In the special case described in the `preDispatch` method above, the `$token` section
diff --git a/Kernel.php b/Kernel.php
index 087a393071..49f3b698ac 100644
--- a/Kernel.php
+++ b/Kernel.php
@@ -76,11 +76,11 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
      */
     private static array $freshCache = [];
 
-    public const VERSION = '6.4.19';
-    public const VERSION_ID = 60419;
+    public const VERSION = '6.4.20';
+    public const VERSION_ID = 60420;
     public const MAJOR_VERSION = 6;
     public const MINOR_VERSION = 4;
-    public const RELEASE_VERSION = 19;
+    public const RELEASE_VERSION = 20;
     public const EXTRA_VERSION = '';
 
     public const END_OF_MAINTENANCE = '11/2026';
@@ -407,7 +407,8 @@ protected function initializeContainer()
         $cachePath = $cache->getPath();
 
         // Silence E_WARNING to ignore "include" failures - don't use "@" to prevent silencing fatal errors
-        $errorLevel = error_reporting(\E_ALL ^ \E_WARNING);
+        $errorLevel = error_reporting();
+        error_reporting($errorLevel & ~\E_WARNING);
 
         try {
             if (is_file($cachePath) && \is_object($this->container = include $cachePath)