diff --git a/application/Espo/Core/Action/Actions/Merge/Merger.php b/application/Espo/Core/Action/Actions/Merge/Merger.php
index e176e275fe..e09771df24 100644
--- a/application/Espo/Core/Action/Actions/Merge/Merger.php
+++ b/application/Espo/Core/Action/Actions/Merge/Merger.php
@@ -42,6 +42,7 @@ use Espo\Core\Record\ActionHistory\Action;
 use Espo\Core\Record\ServiceContainer;
 use Espo\Core\Utils\Metadata;
 use Espo\Core\Utils\ObjectUtil;
+use Espo\Entities\Attachment;
 use Espo\Entities\Note;
 use Espo\ORM\Entity;
 use Espo\Entities\EmailAddress;
@@ -307,6 +308,13 @@ class Merger
                 continue;
             }
 
+            if (
+                $relationDefs->tryGetForeignEntityType() === Attachment::ENTITY_TYPE &&
+                $type === RelationType::HAS_CHILDREN
+            ) {
+                continue;
+            }
+
             if (
                 $type !== Entity::HAS_MANY &&
                 $type !== Entity::HAS_CHILDREN &&