问下拉选择字段保持为空Livewire

EN

 <div class="modal-content">
<form wire:submit.prevent="submit">
            @csrf
            <div class="input-field col s12">
                <label for="role">Client</label>
                <select  class="error validate" wire:ignore id="client_id" wire:model="client_id">
                    <option disabled value="&nbsp;">Client</option>
                    @foreach($clients as $client)
                        <option value="{{$client->id}}"> {{$client->clientname}}</option>
                    @endforeach
                </select>
            </div>
            <div class="input-field col m12 s12">
                <input id="contactperson" type="text" name="contactperson" wire:model="contactperson" />
                @error('contactperson') <span class="error"><small>{{ $message }}</small></span> @enderror
                <label for="contactperson">Contact Person</label>
            </div>

            <div class="row">
                <div class="row">
                    <div class="input-field col s12">
                        <button class="btn cyan waves-effect waves-light right" type="submit">Add
                            <i class="material-icons right">send</i>
                        </button>
                    </div>
                </div>
            </div>
        </form>
</div>

class LeadsForm extends Component
{

public $contactperson;
public $client_id;





public function submit()
{


    Lead::create([
        'client_id' => $this->client_id,
        'contactperson' => $this->contactperson,
       
    ]);

    Alert::toast('Client created successfully', 'success');
    return $this->redirectRoute('leads.index');
}




public function render()
{
    $clients = Client::all();
  

    return view('livewire.leads-form',[
        'clients'=>$clients,
   

    ]);
}