Baza danych problem z przekazaniem danej z formularza

Question

Wyświetla mi się taki błąd
 

SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'translation' cannot be null (SQL: insert into `translations` (`translation`, `updated_at`, `created_at`) values (?, 2019-12-01 12:35:42, 2019-12-01 12:35:42)) 

Model

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Translation extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [

        'id','translation'
    ];
    
}

Widok - formularz

@extends('template')

@section('title')
      
@if (isset ($title))
  {{ $title }}
@endif
@endsection

@section('content')
<div class="container">
<h2>Create new posible translation</h2>
      <form action="{{ action ('TranslationController@store')}}" method="POST" role="form">
         <input type="hidden" name="_token" value="{{ csrf_token() }}"/>
         {{-- Zabezpieczenie formularza przed nieodpowiednim dodawaniem nowego języka --}}
            <div class="form-group">
                  <label for="translation">New translation name</label>
                  <input type="text" class="form-control" name="translation" />
            </div>
                  <input type="submit" value="Add translation"class="btn btn-primary"/>
      </form>
</div>
@endsection('content')

Controller

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Models\Translation;

use App\Repositories\TranslationRepository;

class TranslationController extends Controller
{
    public function index( TranslationRepository $translationRepo ){

        $translations = $translationRepo->getAll();

          return view('translations.list',["translations"=>$translations,
          "footerYear"=>date("Y"),
          "title"=> "Translations list" ]);
      } 
    
    public function create(){
        
        return view('translations.create',[ "footerYear"=>date("Y")]);
    }
    
    public function store(Request $request){
        $translation = new Translation;
        $translation->translation = $request->input('translation');
        $translation->save();

        return redirect()->action('TranslationController@index');
    }
}

Czy może mi ktoś wytłumaczyć skąd ten błąd. I dlaczego dodaje mi puste pole jak ustawię właściwość null w bazie danych?