Ruby on Railsのユーザーページ

Question

Ruby on Railsを使ってTwitterのようなサイトを作ろうとしているのですがユーザーページを作ろうとしてプロフィール画像のカラムを作ろうとすると以下のようなエラーが出てしまいます。

入力したコード

$ rails g migration AddProfilePhotoToUsers profile_photo:string
$ rails db:migrate

エラー

== 20191203111012 AddProfilePhotoToUsers: migrating ===========================
-- add_column(:users, :profile_photo, :string)
rails aborted!
StandardError: An error has occurred, this and all later migrations canceled:

SQLite3::SQLException: duplicate column name: profile_photo: ALTER TABLE "users" ADD "profile_photo" varchar
/Users/pcname/Twitter/db/migrate/20191203111012_add_profile_photo_to_users.rb:3:in `change'
/Users/pcname/Twitter/bin/rails:9:in `<top (required)>'
/Users/pcname/Twitter/bin/spring:15:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<main>'

Caused by:
ActiveRecord::StatementInvalid: SQLite3::SQLException: duplicate column name: profile_photo: ALTER TABLE "users" ADD "profile_photo" varchar
/Users/pcname/Twitter/db/migrate/20191203111012_add_profile_photo_to_users.rb:3:in `change'
/Users/pcname/Twitter/bin/rails:9:in `<top (required)>'
/Users/pcname/Twitter/bin/spring:15:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<main>'

Caused by:
SQLite3::SQLException: duplicate column name: profile_photo
/Users/pcname/Twitter/db/migrate/20191203111012_add_profile_photo_to_users.rb:3:in `change'
/Users/pcname/Twitter/bin/rails:9:in `<top (required)>'
/Users/pcname/Twitter/bin/spring:15:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

Answer 1

duplicate column name
とありますから、もうその名前のcolumnは有るということです