I'm getting an error when trying to update an object instance using PUT using the rest framework: ValueError: Cannot assign "{'id': UUID('954...8b4')}": "DeviceConfig.device" must be a "Device" instance.

view defn:

class DeviceConfigViewSet(viewsets.ModelViewSet):
    #todo: secure
    authentication_classes = []
    queryset = DeviceConfig.objects.all().order_by('device')
    def get_queryset(self):
        device = self.get_renderer_context()["request"].query_params.get('device')
        if device:
            return DeviceConfig.objects.filter(device=Device(device=device))[0:]
        else:
            return self.queryset
    serializer_class = DeviceConfigSerializer

DeviceConfig model:

class DeviceConfig(models.Model):
    device = models.OneToOneField(Device,primary_key=True,on_delete=models.CASCADE)
    bpm = models.DecimalField(max_digits=22, decimal_places=3, blank=True, null=True, default=0.5)
    duty = models.DecimalField(max_digits=22, decimal_places=4, blank=True, null=True, default=0.022)
    ledState = models.IntegerField(
        default=255,
        validators=[MaxValueValidator(255), MinValueValidator(0)]
     )
    pressureMax = models.IntegerField( blank=True, null=True, default=70, validators=[MaxValueValidator(255), MinValueValidator(10)])

JS func FE side:

   function formSubmit(){
        var myForm = document.getElementById("config-form");
        var formObj = new FormData(myForm);
        var object = {};
        formObj.forEach(function(value, key){
            object[key] = value;
        });
        object["device"] = DEVICE_UUID;
        const putMethod = {
            method: 'PUT',
            headers: {
            'Content-type': 'application/json; charset=UTF-8' // Indicates the content 
            },
            body: JSON.stringify(object) 
        }
        fetch("http://localhost:81/configs/"+DEVICE_UUID, putMethod);
    }

I've tried not sending the device ID from the front end but it gives me a 400 then the ol' goog search didn't turn up much for me this time, but I'm not quite sure how to send a Device instance from the client side besides by it's pk which is what I've tried

EDIT - DeviceConfigSerializer

class DeviceConfigSerializer(serializers.HyperlinkedModelSerializer):
    device = serializers.UUIDField(source='device.id')
    class Meta:
        model = DeviceConfig
        fields = ('device','bpm', 'duty','ledState','pressureMax')