设计＆＃34;只有小写字母，数字和＆＃39; _＆＃39;允许＆＃34;

Question

我遇到了设计问题  我跑了rails generate devise:install
然后我跑了rails generate devise User

当我尝试运行rake db:migrate时，我收到此错误消息：

Illegal name for migration file: /Users/jacobchristiansen/12in12/reddit/db/migrate/20150116195344_devise_create_devise:installs.rb
    (only lower case letters, numbers, and '_' allowed)  

我正在使用rails 4.2.0和ruby 2.2.0