diff --git a/src/WorkspaceHelper.php b/src/WorkspaceHelper.php
index 64e8c07b..b3c16031 100644
--- a/src/WorkspaceHelper.php
+++ b/src/WorkspaceHelper.php
@@ -280,7 +280,9 @@ public static function isAllowed($element, Configuration $configuration, string
                 $parent = $parent->getParent();
             }
         }
-        $parentIds[] = $element->getId();
+        if ($element->getId()) {
+            $parentIds[] = $element->getId();
+        }
 
         try {
             $db = Db::get();