title: Rails app error - ActiveRecord::PendingMigrationError Migrations are pending; run 'rake db:migrate RAILS_ENV=development' to resolve this issue
body: <p>The database is created, tables are created, data are there.</p>
  
  <p>But after I restarted the Rails application, I got this error. The app is using MySQL.
  What's the issue here?</p>
  
  <p>Thank you in advance</p>