railsでmodel作成ができない

railsで「sqllite」から「mysql」に変更してから「rails g model テーブル名　カラム」　のコマンドが実行できません。

エラーコードは以下の通り

matsurawataru@matsuurawatarunoMacBook-Pro pokeGO % rails g model Pokemon
/Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/railties-6.0.3.4/lib/rails/application/configuration.rb:231:in `database_configuration': Cannot load database configuration:
undefined method `each' for "use# SQLite. Versions 3.8.0 and up are supported.":String (NoMethodError)
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activerecord-6.0.3.4/lib/active_record/railtie.rb:200:in `block (2 levels) in <class:Railtie>'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.4/lib/active_support/lazy_load_hooks.rb:71:in `class_eval'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.4/lib/active_support/lazy_load_hooks.rb:71:in `block in execute_hook'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.4/lib/active_support/lazy_load_hooks.rb:61:in `with_execution_control'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.4/lib/active_support/lazy_load_hooks.rb:66:in `execute_hook'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.4/lib/active_support/lazy_load_hooks.rb:52:in `block in run_load_hooks'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.4/lib/active_support/lazy_load_hooks.rb:51:in `each'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.4/lib/active_support/lazy_load_hooks.rb:51:in `run_load_hooks'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activerecord-6.0.3.4/lib/active_record/base.rb:327:in `<module:ActiveRecord>'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/activerecord-6.0.3.4/lib/active_record/base.rb:27:in `<main>'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.9/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.9/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.9/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.9/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.9/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/zeitwerk-2.4.0/lib/zeitwerk/kernel.rb:34:in `require'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.1/lib/spring/application.rb:376:in `active_record_configured?'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.1/lib/spring/application.rb:293:in `disconnect_database'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.1/lib/spring/application.rb:111:in `preload'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.1/lib/spring/application.rb:157:in `serve'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.1/lib/spring/application.rb:145:in `block in run'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.1/lib/spring/application.rb:139:in `loop'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.1/lib/spring/application.rb:139:in `run'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/spring-2.1.1/lib/spring/application/boot.rb:19:in `<top (required)>'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	from /Users/matsurawataru/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	from -e:1:in `<main>'

database.ymlのコードは以下の通り

use# SQLite. Versions 3.8.0 and up are supported.
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
#
default: &default
  adapter: mysql2
  encoding: utf8
  pool: 5
  username: root
  password: root
  host: localhost


development:
  <<: *default
  database: pokeGO_development #　DBの名前。「sample」の部分をアプリの名前に変更すると分かりやい
  username: pokemonGO
  password: pokepoke
test:
  <<: *default
  database: pokeGO_test #　DBの名前。「sample」の部分をアプリの名前に変更すると分かりやい

production:
  <<: *default
  database: pokeGO_production
  username: pokeGO_app
  password: <%= ENV['SAMPLE_DATABASE_PASSWORD'] %>

他にどのファイルのコードを貼っていいかわからないので、必要な場合は追記します。

分かる方いらっしゃいましたらご教授よろしくお願い致します。