diff --git a/Model/ContentManager.php b/Model/ContentManager.php
index <HASH>..<HASH> 100644
--- a/Model/ContentManager.php
+++ b/Model/ContentManager.php
@@ -279,6 +279,7 @@ class ContentManager implements ContentManagerInterface
 
         //duplicate content
         $duplicatedContent = clone $content;
+        $duplicatedContent->setSlug(null);
         $duplicatedContent->setValueSet($duplicatedValueset);
 
         if (!is_null($nestedIn)) {
Set slug to null while duplicating