Active Record > Using Callbacks video

After running ruby rails generate migration add_money

class AddMoney < ActiveRecord::Migration
  def change
    add_column :account_entries, :amount, :decimal
    add_column :accounts, :balance, :decimal
  end
end

then, ruby rake db:migrate, I receive the following error in the console:

== 20140303215930 CreateAccounts: migrating =================================== -- create_table(:accounts) rake aborted! StandardError: An error has occurred, all later migrations canceled:

Mysql2::Error: Table 'accounts' already exists: CREATE TABLE accounts (id int(11) auto_increment PRIMARY KEY, type varchar(255), name varchar(255), email varchar(255), about varchar(255), created_at datetime, updated_at datetime) ENGINE=InnoDB/Users/aaa/active_record/biller/db/migrate/20140303215930_create_accounts.rb:3:in change' ActiveRecord::StatementInvalid: Mysql2::Error: Table 'accounts' already exists: CREATE TABLEaccounts(idint(11) auto_increment PRIMARY KEY,typevarchar(255),namevarchar(255),emailvarchar(255),aboutvarchar(255),created_atdatetime,updated_atdatetime) ENGINE=InnoDB /Users/aaa/active_record/biller/db/migrate/20140303215930_create_accounts.rb:3:inchange' Mysql2::Error: Table 'accounts' already exists /Users/aaa/active_record/biller/db/migrate/20140303215930_create_accounts.rb:3:in `change' Tasks: TOP => db:migrate (See full trace by running task with --trace)

Since the beginning of the Query Interface video code, I've been receiving this error, that the table 'accounts' . In the schema.rb file, there is indeed an accounts table. However, it seems to work in the video, but not on my local machine. Any ideas? Thanks in advance!