diff --git a/app/models/bookmark.rb b/app/models/bookmark.rb
index 9918e0f06d4..c741877bdcb 100644
--- a/app/models/bookmark.rb
+++ b/app/models/bookmark.rb
@@ -1,6 +1,10 @@
 # frozen_string_literal: true
 
 class Bookmark < ActiveRecord::Base
+  self.ignored_columns = [
+    "delete_when_reminder_sent" # TODO(2021-07-22): remove
+  ]
+
   belongs_to :user
   belongs_to :post
   belongs_to :topic