我无法初始化设计宝石。当我运行查询bundle exec rails generate devise:install我该如何解决这个问题？
/home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/railties-4.1.0/lib/rails/application.rb:287:in `initialize!': Application has been already initialized. (RuntimeError)
from /home/action/workspace/simplecodecasts_saas/config/environment.rb:9:in `<top (required)>'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `block in require'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:232:in `load_dependency'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/spring-1.3.6/lib/spring/application.rb:92:in `preload'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/spring-1.3.6/lib/spring/application.rb:143:in `serve'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/spring-1.3.6/lib/spring/application.rb:131:in `block in run'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/spring-1.3.6/lib/spring/application.rb:125:in `loop'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/spring-1.3.6/lib/spring/application.rb:125:in `run'
from /home/action/.rvm/gems/ruby-2.1.1@rails4.1.0/gems/spring-1.3.6/lib/spring/application/boot.rb:18:in `<top (required)>'
from /home/action/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /home/action/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'