FIX: Ignore removed column

FIX: Ignore removed column

diff --git a/app/models/group.rb b/app/models/group.rb
index 3e9db51..1f93c99 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -1,6 +1,10 @@
 # frozen_string_literal: true
 
 class Group < ActiveRecord::Base
+  self.ignored_columns = %w{
+    automatic_membership_retroactive
+  }
+
   include HasCustomFields
   include AnonCacheInvalidator
   include HasDestroyedWebHook

GitHub sha: e4a0e0be

cc @vinothkannans