File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\rest_framework_mongoengine\serializers.py", line 639, in build_standard_field
field_class = drf_fields.NullBooleanField
AttributeError: module 'rest_framework.fields' has no attribute 'NullBooleanField'
Getting the attribute error
Django==5.0.1 django-rest-framework-mongoengine==3.4.1 djangorestframework==3.14.0
The NullBooleanField is deprecated and will be removed starting with djangorestframework 3.14.0