Error log of CentOS7 while installing mastodon when `rails db:setup`

log_error_centOS7_mastodon_rails_db_setup.log

[mastodon@myserver live]$ RAILS_ENV=production bundle exec rails db:setup
Database 'mastodon' already exists
rails aborted!
Devise.secret_key was not set. Please add the following to your Devise initializer:

  config.secret_key = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

Please ensure you restarted your application after installing Devise or setting the key.
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/devise-4.3.0/lib/devise/rails/routes.rb:498:in `raise_no_secret_key'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/devise-4.3.0/lib/devise/rails/routes.rb:226:in `devise_for'
/home/mastodon/live/config/routes.rb:22:in `block in <top (required)>'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.1/lib/action_dispatch/routing/route_set.rb:424:in `instance_exec'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.1/lib/action_dispatch/routing/route_set.rb:424:in `eval_block'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.1/lib/action_dispatch/routing/route_set.rb:406:in `draw'
/home/mastodon/live/config/routes.rb:6:in `<top (required)>'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `load'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `load'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:286:in `block in load'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:258:in `load_dependency'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:286:in `load'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application/routes_reloader.rb:55:in `block in load_paths'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application/routes_reloader.rb:55:in `each'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application/routes_reloader.rb:55:in `load_paths'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application/routes_reloader.rb:18:in `reload!'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application/routes_reloader.rb:41:in `block in updater'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/file_update_checker.rb:81:in `execute'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application/routes_reloader.rb:42:in `updater'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application/routes_reloader.rb:31:in `execute_if_updated'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application/finisher.rb:128:in `block in <module:Finisher>'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/initializable.rb:30:in `instance_exec'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/initializable.rb:30:in `run'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/initializable.rb:59:in `block in run_initializers'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/initializable.rb:58:in `run_initializers'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application.rb:353:in `initialize!'
/home/mastodon/live/config/environment.rb:5:in `<top (required)>'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:17:in `require'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:17:in `require'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:292:in `block in require'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:258:in `load_dependency'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:292:in `require'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application.rb:329:in `require_environment!'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/application.rb:445:in `block in run_tasks_blocks'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/commands/rake/rake_command.rb:21:in `block in perform'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/commands/rake/rake_command.rb:18:in `perform'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/command.rb:46:in `invoke'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/railties-5.1.1/lib/rails/commands.rb:16:in `<top (required)>'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:17:in `require'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/bootsnap-1.0.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:17:in `require'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:292:in `block in require'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:258:in `load_dependency'
/home/mastodon/live/vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.1/lib/active_support/dependencies.rb:292:in `require'
bin/rails:4:in `<main>'
Tasks: TOP => db:setup => db:schema:load_if_ruby => environment
(See full trace by running task with --trace)