How to declare dates variable?

Question

PHP

Good afternoon!

I added dates variable to views

<div class="content-up">
  <a class="btn btn--add" href="/admin/imaps/add">Добавить материал</a>
</div>
<table class="table">
  <thead class="thead">
    <tr>
      <th>ID</th><th>Наименование</th><th>Частота сигнала</th><th>Дата ввода</th><th>Редактировать</th><th>Удаление</th>
    </tr>
  </thead>
  <?php foreach ($data as $item) : ?>
    <tr>
      <td><?= $item['Imap']['id']; ?></td>
      <td><?= $item['Imap']['title']; ?></td>
      <td><?= $item['Imap']['frequency']; ?></td>
      <td><?= $item['Imap']['dates']; ?></td>
      <td>
        <a href="/admin/imaps/edit/<?=$item['Imap']['id']?>">Редактировать</a>
      </td>
      <td>
      <?php echo $this->Form->postLink('Удалить', array('action' => 'admin_delete', $item['Imap']['id']), array('confirm' => 'Подтвердите удаление')); ?>	
      </td>
    </tr>
  <?php endforeach; ?>
</table>

All this is written to the data array and written to the database. But I ran into an error

2020-08-05 09:27:54 Notice: Notice (8): Undefined index: dates in [/app/View/Imaps/admin_index.ctp, line 15]
Trace:

Here is the controller code

<?php

class ImapsController extends AppController{
  public function beforeFilter(){
    parent::beforeFilter();
  }
  // public $uses = array('Imap', 'Region');


  public function admin_index(){
    $data = $this->Imap->find('all');
    $this->set(compact('data'));
  }

  public function admin_add(){
    if($this->request->is('post')){
      $this->Imap->create();
      $data = $this->request->data['Imap'];
      if($this->Imap->save($data)){
        $this->Session->setFlash('Сохранено', 'default', array(), 'good');
        return $this->redirect($this->referer());
      }else{
        $this->Session->setFlash('Ошибка', 'default', array(), 'bad');
      }
    }
    $this->Imap->Region->locale = 'ru';
    $regions = $this->Imap->Region->find('list');
    $this->set(compact('title_for_layout', 'regions'));
  }

  public function admin_edit($id){

    if(is_null($id) || !(int)$id || !$this->Imap->exists($id)){
      throw new NotFoundException('Такой страницы нет...');
    }

    $data = $this->Imap->findById($id);

    if(!$id){
      throw new NotFoundException('Такой страницы нет...');
    }
    if($this->request->is(array('post', 'put'))){
      $this->Imap->id = $id;
      $data1 = $this->request->data['Imap'];
      $data1['id'] = $id;
      if($this->Imap->save($data1)){
        $this->Session->setFlash('Сохранено', 'default', array(), 'good');
        return $this->redirect($this->referer());
      }else{
        $this->Session->setFlash('Ошибка', 'default', array(), 'bad');
      }
    }
    //Заполняем данные в форме
    if($this->request->is('post')){
      $this->request->data = $data1;
      $data = $data1;
    }else{
      $data = $this->request->data = $this->Imap->read(null, $id);
    }
    $this->Imap->Region->locale = 'ru';
    $this->Imap->District->locale = 'ru';
    $this->Imap->Town->locale = 'ru';
    $regions = $this->Imap->Region->find('list');
    $districts = $this->Imap->District->find('list');
    $towns = $this->Imap->Town->find('list');
    $this->set(compact('id', 'data', 'regions','districts', 'towns'));
  }

  public function admin_delete($id){
    if (!$this->Imap->exists($id)) {
      throw new NotFounddException('Такой статьи нет');
    }
    if($this->Imap->delete($id)){
      $this->Session->setFlash('Удалено', 'default', array(), 'good');
    }else{
      $this->Session->setFlash('Ошибка', 'default', array(), 'bad');
    }
    return $this->redirect($this->referer());
  }

}

Tell me how to deal with Undefined index: dates ?