diff --git a/src/CoreShop/Component/Pimcore/DataObject/AbstractSluggableLinkGenerator.php b/src/CoreShop/Component/Pimcore/DataObject/AbstractSluggableLinkGenerator.php
index 191270f908..2d0102b2d3 100644
--- a/src/CoreShop/Component/Pimcore/DataObject/AbstractSluggableLinkGenerator.php
+++ b/src/CoreShop/Component/Pimcore/DataObject/AbstractSluggableLinkGenerator.php
@@ -20,6 +20,10 @@ abstract class AbstractSluggableLinkGenerator implements LinkGeneratorInterface
 {
     protected function slugify($string): string
     {
+        if ($string === null) {
+            return '';
+        }
+
         return strtolower(
             trim(
                 preg_replace('~[^0-9a-z]+~i', '-', html_entity_decode(