ruby アプリをherokuでデプロイする際に Failed to install gems via Bundler.

Question

ruby アプリをherokuでデプロイしようとgit push heroku masterするとエラーが出ます。

rubyのバージョンの関係でHeroku-20からheroku-18に落としています。

Your Gemfile lists the gem sqlite3 (>= 0) more than once.
You should probably keep only one of them.
と書かれていたので、gemfile確認してgem 'sqlite3'の記載が二行あったので消しました。
しかしエラー内容は変わりません

bundle installはうまくいっています。

原因がわかりません。
ご教授お願いします。

• ruby 2.5.1
• rails 5.2.3
• bundler 2.2.15

ruby '2.5.1'

gem 'rails', '~> 5.2.3'
# gem 'sqlite3'
gem 'puma', '~> 3.11'
gem 'sass-rails', '~> 5.0'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.2'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.5'
group :development, :test do
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do 
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  gem 'selenium-webdriver'
  gem 'chromedriver-helper'
end
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
gem 'font-awesome-sass'
#デプロイ用
gem 'sqlite3', group: [:development, :test]

ターミナル
remote: -----> Installing bundler 2.2.16
remote: -----> Removing BUNDLED WITH version in the Gemfile.lock
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-2.5.1
remote: -----> Installing dependencies using bundler 2.2.16
remote:        Running: BUNDLE_WITHOUT='development:test' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 bundle install -j4
remote:        Your Gemfile lists the gem sqlite3 (>= 0) more than once.
remote:        You should probably keep only one of them.
remote:        Remove any duplicate entries and specify the gem only once.
remote:        While it's not a problem now, it could cause errors if you change the version of one of them later.
remote:        Fetching gem metadata from https://rubygems.org/............
remote:        Your bundle is locked to mimemagic (0.3.3) from rubygems repository
remote:        https://rubygems.org/ or installed locally, but that version can no longer be
remote:        found in that source. That means the author of mimemagic (0.3.3) has removed it.
remote:        You'll need to update your bundle to a version other than mimemagic (0.3.3) that
remote:        hasn't been removed in order to install.
remote:        Bundler Output: Your Gemfile lists the gem sqlite3 (>= 0) more than once.
remote:        You should probably keep only one of them.
remote:        Remove any duplicate entries and specify the gem only once.
remote:        While it's not a problem now, it could cause errors if you change the version of one of them later.
remote:        Fetching gem metadata from https://rubygems.org/............
remote:        Your bundle is locked to mimemagic (0.3.3) from rubygems repository
remote:        https://rubygems.org/ or installed locally, but that version can no longer be
remote:        found in that source. That means the author of mimemagic (0.3.3) has removed it.
remote:        You'll need to update your bundle to a version other than mimemagic (0.3.3) that
remote:        hasn't been removed in order to install.
remote: 
remote:  !
remote:  !     Failed to install gems via Bundler.
remote:  !
remote:  !     Push rejected, failed to compile Ruby app.
remote: 
remote:  !     Push failed
remote:  !
remote:  ! ## Warning - The same version of this code has already been built: e344d8d12487b25f1b4ff06e2b4de252b350f9b2
remote:  !
remote:  ! We have detected that you have triggered a build from source code with version e344d8d12487b25f1b4ff06e2b4de252b350f9b2
remote:  ! at least twice. One common cause of this behavior is attempting to deploy code from a different branch.
remote:  !
remote:  ! If you are developing on a branch and deploying via git you must run:
remote:  !
remote:  !     git push heroku <branchname>:main
remote:  !
remote:  ! This article goes into details on the behavior:
remote:  !   https://devcenter.heroku.com/articles/duplicate-build-version
remote: 
remote: Verifying deploy...
remote: 
remote: !	Push rejected to ryutanew.
remote: 
To https://git.heroku.com/ryutanew.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/ryutanew.git'
kobayashi-no-MacBook-Air:ryutanew MISIAN$ bundler -v
Bundler version 2.2.15

Answer 1

Your bundle is locked to mimemagic (0.3.3) from rubygems repository

最近話題になったmimemagicのGPL混入問題ですね
bundle update railsにてRails5.2.5にアップデートする事で改善するかと思います。