old_contents: from django.contrib import admin
  
  from .models import AdditionalField, AdditionalFieldValue, ConsentFieldValue
  
  
  class AdditionalFieldAdmin(admin.ModelAdmin):
      pass
  
  
  class AdditionalFieldValueAdmin(admin.ModelAdmin):
      readonly_fields = ('user', )
  
  
  class ConsentFieldValueAdmin(admin.ModelAdmin):
      readonly_fields = ('user', 'consent')
  
  
  admin.site.register(AdditionalField, AdditionalFieldAdmin)
  admin.site.register(AdditionalFieldValue, AdditionalFieldValueAdmin)
  admin.site.register(ConsentFieldValue, ConsentFieldValueAdmin)
  
new_contents: from django.contrib import admin
  
  from .models import AdditionalField, AdditionalFieldValue, ConsentFieldValue
  
  
  class AdditionalFieldAdmin(admin.ModelAdmin):
      pass
  
  
  class AdditionalFieldValueAdmin(admin.ModelAdmin):
      readonly_fields = ('user', )
  
  
  class ConsentFieldValueAdmin(admin.ModelAdmin):
      readonly_fields = ('user', 'consent')
  
      def has_add_permission(self, request, obj=None):
          return False
  
  
  admin.site.register(AdditionalField, AdditionalFieldAdmin)
  admin.site.register(AdditionalFieldValue, AdditionalFieldValueAdmin)
  admin.site.register(ConsentFieldValue, ConsentFieldValueAdmin)
  
subject: Fix ConsentFieldValueAdmin