      UniqueTogetherValidator
  )
  import copy
  import inspect
  import warnings
  
  # Note: We do the following so that users of the framework can use this style:
  #
  #     example_field = serializers.CharField(...)
  #
 
</s> remove         instance = ModelClass.objects.create(**validated_attrs)
 </s> add         try:
            instance = ModelClass.objects.create(**validated_attrs)
        except TypeError as exc:
            msg = (
                'The mentioned argument might be a field on the serializer '
                'that is not part of the model. You need to override the '
                'create() method in your ModelSerializer subclass to support '
                'this.')
            six.reraise(
                type(exc),
                type(exc)(str(exc) + '. ' + msg),
                sys.exc_info()[2])
import sys
      UniqueTogetherValidator
  )
  import copy
  import inspect
import sys
  import warnings
  
  # Note: We do the following so that users of the framework can use this style:
  #
  #     example_field = serializers.CharField(...)
  #
keep keep keep add keep keep keep keep keep keep
 More helpful error message when default `.create` fails. Closes #2013. 
rest_framework/serializers.py