Unable to save hidden() fields to database !!

Step::make('Etap 7')
                ->description("Montant Octroyé")
                ->schema([
                    Fieldset::make('Montant Octroyé')
                        ->relationship('granted_amount')
                        ->schema([

                            TextInput::make('granted_amount')
                                ->label('Montant Octroyé'),


                            TextInput::make('current_year')
                                ->label('current_year'),


                            TextInput::make('annee_inscription')
                                ->label("Année d'inscription")->hiddenn()
                                ->default(date("Y") . "/" . date("Y") + 1),

                        ]),
                ]),

protected function afterCreate(): void
    {
        dd("After", $this->data);

    }

 "granted_amount" => array:3 [▼
    "granted_amount" => null
    "current_year" => null
    "annee_inscription" => "2023/2024"
  ]