  from django.utils.duration import duration_string
  from django.utils.encoding import is_protected_type, smart_str
  from django.utils.formats import localize_input, sanitize_separators
  from django.utils.ipv6 import clean_ipv6_address
  from django.utils.timezone import utc
  from django.utils.translation import gettext_lazy as _
  from pytz.exceptions import InvalidTimeError
  
  from rest_framework import (
      ISO_8601, RemovedInDRF313Warning, RemovedInDRF314Warning
 
</s> remove from django.utils.timezone import activate, deactivate, override, utc
 </s> add from django.utils.timezone import activate, deactivate, override </s> remove from django.utils.timezone import utc
 </s> add 
  from django.utils.duration import duration_string
  from django.utils.encoding import is_protected_type, smart_str
  from django.utils.formats import localize_input, sanitize_separators
  from django.utils.ipv6 import clean_ipv6_address

  from django.utils.translation import gettext_lazy as _
  from pytz.exceptions import InvalidTimeError
  
  from rest_framework import (
      ISO_8601, RemovedInDRF313Warning, RemovedInDRF314Warning
keep keep keep keep replace keep keep keep keep keep
 Confirmed support for Django 4.1. (#8498) 
rest_framework/fields.py