Fix clashing global twig variable

src/Controller/CRUDController.php

@@ -994,18 +994,15 @@ final public function configureAdmin(Request $request): void
      */
     final public function setTwigGlobals(Request $request): void
     {
-        $twig = $this->container->get('twig');
-        \assert($twig instanceof Environment);
-
-        $twig->addGlobal('admin', $this->admin);
+        $this->setTwigGlobal('admin', $this->admin);
 
         if ($this->isXmlHttpRequest($request)) {
             $baseTemplate = $this->templateRegistry->getTemplate('ajax');
         } else {
             $baseTemplate = $this->templateRegistry->getTemplate('layout');
         }
 
-        $twig->addGlobal('base_template', $baseTemplate);
+        $this->setTwigGlobal('base_template', $baseTemplate);
     }
 
     /**
@@ -1543,6 +1540,18 @@ final protected function checkParentChildAssociation(Request $request, object $o
         }
     }
 
+    private function setTwigGlobal(string $name, mixed $value): void
+    {
+        $twig = $this->container->get('twig');
+        \assert($twig instanceof Environment);
+
+        try {
+            $twig->addGlobal($name, $value);
+        } catch (\LogicException) {
+            // Variable already set
+        }
+    }
+
     private function getBatchActionExecutable(string $action): callable
     {
         $batchActions = $this->admin->getBatchActions();