diff --git a/application/Espo/Services/Attachment.php b/application/Espo/Services/Attachment.php
index 4eecf0bb72..4002af5e07 100644
--- a/application/Espo/Services/Attachment.php
+++ b/application/Espo/Services/Attachment.php
@@ -158,7 +158,7 @@ class Attachment extends Record
         unset($data->parentId);
         unset($data->relatedId);
 
-        $isBeingUploaded = (bool) $data->isBeingUploaded;
+        $isBeingUploaded = (bool) ($data->isBeingUploaded ?? false);
 
         $contents = '';