Failed upgrade from 2.3.2 to 2.3.6 due to discourse assign plugin

Support Self-hosting
4

Here is the guilty one:
20191119174425_rename_site_setting_assign_emailer.rb

Contains:

# frozen_string_literal: true

class RenameSiteSettingAssignEmailer < ActiveRecord::Migration[6.0]
  def up
    execute "UPDATE site_settings
             SET name = 'assign_mailer', value = '#{AssignMailer.levels[:always]}', data_type = #{SiteSettings::TypeSup
ervisor.types[:enum]}
             WHERE name = 'assign_mailer_enabled' AND value = 't' AND data_type = #{SiteSettings::TypeSupervisor.types[
:enum]}"

    execute "UPDATE site_settings
             SET name = 'assign_mailer', value = '#{AssignMailer.levels[:never]}', data_type = #{SiteSettings::TypeSupe
rvisor.types[:enum]}
             WHERE name = 'assign_mailer_enabled' AND value = 'f' AND data_type = #{SiteSettings::TypeSupervisor.types[
:enum]}"
  end

  def down
    raise ActiveRecord::IrreversibleMigration
  end
end

How can i fix this? If I fix it directly in this file, will the repository be downloaded again when the rebuild starts and my changes will be erased?