fix project package save service

app/services/project_packages/save_service.rb

@@ -51,7 +51,9 @@ class ProjectPackages::SaveService
     package.attachments.where(id: destroy_ids).delete_all
 
     new_ids = attachment_ids - old_attachment_ids
-    Attachment.where(id: new_ids).update_all(container_type: package.id, container_type: 'ProjectPackage') if new_ids.present?
+    if new_ids.present?
+      Attachment.where(id: new_ids, container_id: nil).update_all(container_id: package.id, container_type: 'ProjectPackage')
+    end
   end
 
   def send_create_notify!