Symfony 4 type: The option "0" does not exist

I found an answer to a similar problem than mine, but I don't understand how it works and what should I change in my code. So I ask you for help, I have this error message :

The option "0" does not exist. Defined options are: "action", "allow_extra_fields", "allow_file_upload", "attr", "auto_initialize", "block_name", "by_reference", "compound", "constraints", "csrf_field_name", "csrf_message", "csrf_protection", "csrf_token_id", "csrf_token_manager", "data", "data_class", "disabled", "empty_data", "error_bubbling", "error_mapping", "extra_fields_message", "help", "help_attr", "inherit_data", "invalid_message", "invalid_message_parameters", "label", "label_attr", "label_format", "mapped", "method", "post_max_size_message", "property_path", "required", "translation_domain", "trim", "upload_max_size_message", "validation_groups".

Here is my Type:

<?phpnamespace App\Form;use App\Entity\Equipment;use App\Entity\Property;use Symfony\Bridge\Doctrine\Form\Type\EntityType;use Symfony\Component\Form\Extension\Core\Type\ChoiceType;use Symfony\Component\Form\Extension\Core\Type\IntegerType;use Symfony\Component\Form\Extension\Core\Type\NumberType;use Symfony\Component\Form\Extension\Core\Type\TextType;use Symfony\Component\Form\AbstractType;use Symfony\Component\Form\Extension\Core\Type\CountryType;use Symfony\Component\Form\FormBuilderInterface;use Symfony\Component\OptionsResolver\OptionsResolver;class PropertyType extends AbstractType{    public function buildForm(FormBuilderInterface $builder, array $options)    {        $builder            ->add('propertyCategory', ChoiceType::class, ['required' => true,'choices' => ['Appartement' => 'Appartement','Maison' => 'Maison','Garage' => 'Garage','Bureau' => 'Bureau','Château' => 'Château','Commerce' => 'Commerce',                ]            ])            ->add('uniqueName', TextType::class, ['required' => true, 'label' => 'Nom unique'])            ->add('address', TextType::class, ['required' => true, 'label' => 'Adresse'])            ->add('city', TextType::class, ['required' => true, 'label' => 'Ville'])            ->add('zipcode', IntegerType::class, ['required' => true, 'label' => 'Code postal'])            ->add('country', CountryType::class, ['required' => true, 'label' => 'Pays'])            ->add('surfaceInSquareMeter', IntegerType::class, ['required' => true,'label' => 'Surface en m²'            ])            ->add('numberOfPiece', IntegerType::class, ['required' => true, 'label' => 'Nombre de pièces'])            ->add('description', TextType::class, ['required' => false, 'Description'])            ->add('equipments', EntityType::class, ['required' => false,'label' => 'Equipements',                ['class' => Equipment::class,'multiple' => true,'expanded' => true,'choice_label' => 'name'                ]            ])            ->add('locationCategory', ChoiceType::class, ['required' => true,'choices' => ['Meublé' => 'Meublé','Non meublé' => 'Non meublé',                ]            ])            ->add('rentExcludingCharges', NumberType::class, ['required' => true,'label' => 'Loyer hors charges'            ])            ->add('charges', NumberType::class, ['required' => true, 'label' => 'Charges'])            ->add('purchasePrice', NumberType::class, ['required' => true, 'label' => 'Prix d\'achat']);    }    public function configureOptions(OptionsResolver $resolver)    {        $resolver->setDefaults(['data_class' => Property::class,        ]);    }}

Hope you understand my english and someone can help me (and explain me how to avoid to do this mistake again)

Thx

EDIT : there was a problem with those useless[] in

->add('equipments', EntityType::class, ['required' => false,'label' => 'Equipements',            ['class' => Equipment::class,'multiple' => true,'expanded' => true,'choice_label' => 'name'            ]        ])

, I resolved it but error message is same