Select2 + Ajax + Django

Why isn’t working here? The select works fine, but when i try to sent the form, shows that form is invalid.

View.py:

class EntradaAutocomplete(View):
    def get(self, request, *args, **kwargs):
        term = request.GET.get('term', '')
        queryset = Entrada.objects.filter(id__icontains=term)[:50]  # Filtra e limita os resultados
        results = []
        for entrada in queryset:
            results.append({
                'id': entrada.id,
                'text': entrada.id})

        return JsonResponse({'results': results}, safe=False)

form.py:

class LocalizacaoProntuarioMultiplosCreateForm(forms.Form):
    data_cadastro = forms.DateTimeField(
        widget=forms.DateTimeInput(attrs={'class': 'form-control', 'type': 'datetime-local'}),
        initial=(timezone.now() - timedelta(hours=3)).strftime('%Y-%m-%dT%H:%M'),
        label="Data",
        required=True
    )

    entradas = forms.ModelMultipleChoiceField(
        queryset=Entrada.objects.all()[:10],
        widget=forms.SelectMultiple(attrs={'class': 'form-control select2'}),
        label="Entradas",
        required=True
    )
    def __init__(self, *args, **kwargs):
        super(LocalizacaoProntuarioMultiplosCreateForm, self).__init__(*args, **kwargs)

html/script:

<script type="text/javascript">
        $(document).ready(function() {
            // Inicializa o Select2 com AJAX
            $('.select2').select2({
                ajax: {
                    url: "{% url 'entrada_autocomplete' %}",
                    dataType: 'json',
                    delay: 250,
                    data: function (params) {
                        return {
                            term: params.term  // Termo de busca
                        };
                    },
                    processResults: function (data) {
                        return {
                            results: data.results
                        };
                    },
                    cache: true
                },
                minimumInputLength: 0,
                placeholder: 'Digite para pesquisar',
                multiple: true,
                allowClear: true
            });
        });
    </script>