diff --git a/src/GraphQL/DataObjectInputProcessor/ManyToManyRelation.php b/src/GraphQL/DataObjectInputProcessor/ManyToManyRelation.php
index 2826ba76..b09499ad 100644
--- a/src/GraphQL/DataObjectInputProcessor/ManyToManyRelation.php
+++ b/src/GraphQL/DataObjectInputProcessor/ManyToManyRelation.php
@@ -20,6 +20,7 @@
 use Pimcore\Bundle\DataHubBundle\GraphQL\Traits\ElementIdentificationTrait;
 use Pimcore\Model\DataObject\Concrete;
 use Pimcore\Model\DataObject\Fieldcollection\Data\AbstractData;
+use Pimcore\Model\Exception\NotFoundException;
 
 class ManyToManyRelation extends Base
 {
@@ -45,6 +46,10 @@ public function process($object, $newValue, $args, $context, ResolveInfo $info)
 
                     if ($element) {
                         $result[] = $element;
+                    } else {
+                        throw new NotFoundException(
+                            "Doesn't found element: " . $newValueItemValue['fullpath'] ?? $newValueItemValue['id']
+                        );
                     }
                 }
             }