old_contents: from django import forms
  
  from cyder.base.eav.forms import get_eav_form
  from cyder.base.mixins import UsabilityFormMixin
  from cyder.core.system.models import System, SystemAV
  
  
  class SystemForm(forms.ModelForm):
  
      class Meta:
          model = System
  
  
  class ExtendedSystemForm(forms.ModelForm, UsabilityFormMixin):
      interface_type = forms.ChoiceField(
          widget=forms.RadioSelect, choices=(
              ('Static', 'Static Interface'),
              ('Dynamic', 'Dynamic Interface')))
  
      class Meta:
          model = System
  
  
  SystemAVForm = get_eav_form(SystemAV, System)
  
new_contents: from django import forms
  
  from cyder.base.eav.forms import get_eav_form
  from cyder.base.mixins import UsabilityFormMixin
  from cyder.core.system.models import System, SystemAV
  
  
  class SystemForm(forms.ModelForm):
  
      class Meta:
          model = System
  
  
  class ExtendedSystemForm(forms.ModelForm, UsabilityFormMixin):
      interface_type = forms.ChoiceField(
          widget=forms.RadioSelect, choices=(
              ('static_interface', 'Static Interface'),
              ('dynamic_interface', 'Dynamic Interface')))
  
      class Meta:
          model = System
  
  
  SystemAVForm = get_eav_form(SystemAV, System)
  
subject: Fix system form interface_type choices