You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 20161117000001_job_unable_to_create_issue_432.rb
    path of file: ./repos/zammad/db/migrate
    
    the code of the file until where you have to start completion: # Copyright (C) 2012-2024 Zammad Foundation, https://zammad-foundation.org/

class JobUnableToCreateIssue432 < ActiveRecord::Migration[4.2]
  def up
    # return if it's a new setup
    return if !Sett
    
  def up
    # return if it's a new setup
    return if !Setting.exists?(name: 'system_init_done')

    ActiveRecord::Migration.change_table :jobs do |t|
      t.change :timeplan, :string, limit: 2500
      t.change :condition, :text, limit: 500.kilobytes + 1
      t.change :perform, :text, limit: 500.kilobytes + 1
    end

    ActiveRecord::Migration.change_table :triggers do |t|
      t.change :condition, :text, limit: 500.kilobytes + 1
      t.change :perform, :text, limit: 500.kilobytes + 1
    end

    ActiveRecord::Migration.change_table :overviews do |t|
      t.change :condition, :text, limit: 500.kilobytes + 1
    end

    ActiveRecord::Migration.change_table :report_profiles do |t|
      t.change :condition, :text, limit: 500.kilobytes + 1
    end
    ActiveRecord::Migration.change_table :slas do |t|
      t.change :condition, :text, limit: 500.kilobytes + 1
    end

    ActiveRecord::Migration.change_table :macros do |t|
      t.change :perform, :text, limit: 500.kilobytes + 1
    end

    ActiveRecord::Migration.change_table :postmaster_filters do |t|
      t.change :match, :text, limit: 500.kilobytes + 1
      t.change :perform, :text, limit: 500.kilobytes + 1
    end

    ActiveRecord::Migration.change_table :stats_stores do |t|
      t.change :data, :string, limit: 5000
    end

    Rails.cache.clear

  end