How to save ProductAttributesValues in Django Oscar Commerce

Question

I'm trying to save m2m relation in Product model on Django Oscar Commerce package, the model has an many to many relation through the ProductAttributeValues model.

Making Postan POST method query to url 127.0.0.1:8000/api/products/1/update/ serializers.py:

class ProductAttributeValueSerializer(OscarModelSerializer):
  class Meta:
    model = ProductAttributeValue
    fields = '__all__'

class ProductSerializer(OscarModelSerializer):
  attribute_valuess = ProductAttributeValueSerializer(many=True, read_only=False)
  class Meta:
    model = catalogue_models.Product
    fields = '__all__'

The json content:

{
  'title': 'Producto 4',
  'is_public': True,
  'description': 'descripción',
  'attribute_values': [
    {'value_text': 'contenido', 'attribute': 1, 'product': 1},
    {'value_text': 'contenido', 'attribute': 2, 'product': 1}
  ]
}

The postman return this json:

{
  "attribute_values": [
    {
      "non_field_errors": [
        "The fields attribute, product must make a unique set."
      ]
    },
    {
      "non_field_errors": [
        "The fields attribute, product must make a unique set."
      ]
    }
  ]
}

Anybody could help me please ? Thanks in advance.