Django form filter Queryset keeping the current item.

I have a booking model and a vehicle model.
I want to filter the FK model vehicle, based on the choiceField and keeping the current vehicle item.

class Vehicle(models.Model):
        ('active', 'active'),
        ('available', 'available')
    serial_number = models.CharField(max_length= 10)
    status  = models.CharField(max_length= 10, choices= STATUS_CHOICES)

class Booking(models.Model):
    title = models.CharField(max_length= 50)
    vehicle = models.ForeignKey(Vehicle, on_delete.....)

class BookingForm(forms.ModelForm):
   class Meta:
        model= Booking
        fields = '__all__'

    def __init__(self, *args, **kwargs): 
        super(BookingForm, self).__init__(*args, **kwargs)
        self.fields['vehicle'].queryset = Vehicle.objects.filter(Q(status = 'Available'))

now when I add a vehicle to booking I get all the available vehicles, once a vehicle is added to booking the vehicle status changes from available to active.
when I edit the same entry the vehicle objects disappears as its an active vehicle…

how would I get the filtered query + the current vehicle ???

It would help a lot to see the view that is creating the page using this form.

In the general case, you’ll need to pass the parameter representing the “current booking” to the form, using that parameter within the filter.