新規登録のとき、nicknameカラムが保存されない

前提・実現したいこと

ユーザー新規登録をするときに、Unpermitted parameter: :nicknameというエラーが出てしまい保存できません。

発生している問題・エラーメッセージ

Started POST "/users" for ::1 at 2021-02-03 23:42:30 +0900
Processing by Devise::RegistrationsController#create as HTML
  Parameters: {"authenticity_token"=>"TJ41q0CkHghR3wfKnZoGIFT0m6sLNskM6phuA/AmDt15ao5+Cp6ePTa4KJzbFXg0L0h4q5tWSjwG5UyzLRAJYw==", "user"=>{"nickname"=>"ddd", "email"=>"somato.0311@gmail.com", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}, "commit"=>"Sign up"}
Unpermitted parameter: :nickname
   (0.5ms)  BEGIN
  User Exists? (24.6ms)  SELECT 1 AS one FROM `users` WHERE `users`.`email` = BINARY 'somato.0311@gmail.com' LIMIT 1
   (0.3ms)  ROLLBACK
  Rendering devise/registrations/new.html.erb within layouts/application
  Rendered devise/shared/_error_messages.html.erb (Duration: 0.7ms | Allocations: 301)
  Rendered devise/registrations/new.html.erb within layouts/application (Duration: 3.2ms | Allocations: 1335)
[Webpacker] Everything's up-to-date. Nothing to do
Completed 200 OK in 451ms (Views: 16.2ms | ActiveRecord: 25.3ms | Allocations: 33049)

DB

def change
    create_table :users do |t|
      ## Database authenticatable
      t.string :nickname,           null: false, default: ""
      t.string :email,              null: false, default: ""
      t.string :encrypted_password, null: false, default: ""

schema

create_table "users", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
    t.string "nickname", default: "", null: false
    t.string "email", default: "", null: false
    t.string "encrypted_password", default: "", null: false
    t.string "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.datetime "created_at", precision: 6, null: false
    t.datetime "updated_at", precision: 6, null: false
    t.index ["email"], name: "index_users_on_email", unique: true
    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
  end

model

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

  has_many :articles
  has_many :comments
  has_many :likes

  validates :nickname, presence: true, length: { in: 2..6 } 
end

controller

class ApplicationController < ActionController::Base

  before_action :configure_permitted_parameters, if: :devise_controller?

  private

  def configure_permitted_parameters
    devise_parameter_sanitizer.permit(:sign_up, keys: [:nickname])
    devise_parameter_sanitizer.permit(:sign_in, keys: [:email, :password])
  end

end

view

<h2>Sign up</h2>

<%= form_for(resource, as: resource_name, url: registration_path(resource_name), local: true) do |f| %>
  <%= render "devise/shared/error_messages", resource: resource %>

  <div class="field">
    <%= f.label :nickname %><br />
    <%= f.text_area :nickname%>
  </div>

  <div class="field">
    <%= f.label :email %><br />
    <%= f.email_field :email, autofocus: true, autocomplete: "email" %>
  </div>

  <div class="field">
    <%= f.label :password %>
    <% if @minimum_password_length %>
    <em>(<%= @minimum_password_length %> characters minimum)</em>
    <% end %><br />
    <%= f.password_field :password, autocomplete: "new-password" %>
  </div>

  <div class="field">
    <%= f.label :password_confirmation %><br />
    <%= f.password_field :password_confirmation, autocomplete: "new-password" %>
  </div>

  <div class="actions">
    <%= f.submit "Sign up" %>
  </div>
<% end %>

<%= render "devise/shared/links" %>