Moussas-MacBook-Pro:theBlog moussasarr$ bin/rake db:migrate RAILS_ENV=development
== 20141031151735 SorceryCore: migrating ======================================
-- create_table(:authors)
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

SQLite3::SQLException: table "authors" already exists: CREATE TABLE "authors" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "username" varchar(255) NOT NULL, "email" varchar(255) NOT NULL, "crypted_password" varchar(255) NOT NULL, "salt" varchar(255) NOT NULL, "created_at" datetime, "updated_at" datetime) /Users/moussasarr/.rvm/gems/ruby-2.0.0-p576@railstutorial_rails_4_0/gems/sqlite3-1.3.8/lib/sqlite3/database.rb:91:in `initialize'

class SorceryCore < ActiveRecord::Migration
    def change
     create_table :authors do |t|
      t.string :username,         :null => false
      t.string :email,            :null => false
      t.string :crypted_password, :null => false
      t.string :salt,             :null => false
      t.timestamps
      end
      add_index :authors, :email, unique: true
      end
      end