User profile ModelForm with a custom group field

forms.py

from django import forms
from django.contrib.auth.models import User, Group

class UserProfileForm(forms.ModelForm):
    group = forms.ModelChoiceField(queryset=Group.objects.all(),
                                   required=True)
    
    class Meta:
        model = User
        fields = ['first_name', 'last_name', 'email', 'group']