ActiveHash実装時のNameError

ActiveHash実装

アソシエーションが組めていないためかidが流れていない状態かと思っています。
が、解決が私には難しく、お力をお借りできれば幸いです。

ruby -v: ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin20]
rails -v: Rails 6.0.3.6
gem -v: 3.0.3

試したこと
再bundle install

rails c
irb(main):001:0> @area_record_1
=> nil
irb(main):002:0> @area
=> nil
確認

routes.rb

  devise_for :users

  root to: "youtube_vact#index"

  resources :youtube_vact , only: [:new, :create, :index, :show] do
    resource :user_skills, only: [:edit]
end

end

models/user_skill.rb

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :validatable

         validates :name, presence: true

      has_many :user_skills
end

models/user.rb

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :validatable

         validates :name, presence: true

      has_many :user_skills
end

edit.html.erb

<form class="form" action="#" method="post">
 
 <textarea name="introduction" cols="30" rows="5"></textarea></p>


    <div class="form-group">
   <label for="password">エリア</label>
   <%= f.collection_select(:area_id, Area.all, :id, :name, {}, {class:"select-box", id:"user-area"}) %>
   </div>

	<p><input type="submit" value="編集完了"></p>
</form>

models/area.rb

class Area < ActiveHash::Base
  self.data = [
      {id: 1, name: '--'},
      {id: 2, name: '北海道'}, {id: 3, name: '青森県'}, {id: 4, name: '岩手県'},
      {id: 5, name: '宮城県'}, {id: 6, name: '秋田県'}, {id: 7, name: '山形県'},
      {id: 8, name: '福島県'}, {id: 9, name: '茨城県'}, {id: 10, name: '栃木県'},
      {id: 11, name: '群馬県'}, {id:12, name: '埼玉県'}, {id:13, name: '千葉県'},
      {id: 14, name: '東京都'}, {id: 15, name: '神奈川県'}, {id: 16, name: '新潟県'},
      {id: 17, name: '富山県'}, {id: 18, name: '石川県'}, {id: 19, name: '福井県'},
      {id: 20, name: '山梨県'}, {id: 21, name: '長野県'}, {id: 22, name: '岐阜県'},
      {id: 23, name: '静岡県'}, {id: 24, name: '愛知県'}, {id: 25, name: '三重県'},
      {id: 26, name: '滋賀県'}, {id: 27, name: '京都府'}, {id: 28, name: '大阪府'},
      {id: 29, name: '兵庫県'}, {id: 30, name: '奈良県'}, {id: 31, name: '和歌山県'},
      {id: 32, name: '鳥取県'}, {id: 33, name: '島根県'}, {id: 34, name: '岡山県'},
      {id: 35, name: '広島県'}, {id: 36, name: '山口県'}, {id: 37, name: '徳島県'},
      {id: 38, name: '香川県'}, {id: 39, name: '愛媛県'}, {id: 40, name: '高知県'},
      {id: 41, name: '福岡県'}, {id: 42, name: '佐賀県'}, {id: 43, name: '長崎県'},
      {id: 44, name: '熊本県'}, {id: 45, name: '大分県'}, {id: 46, name: '宮崎県'},
      {id: 47, name: '鹿児島県'}, {id: 48, name: '沖縄県'}
  ]

  include ActiveHash::Associations
  has_many :user_skills
end