django += 1 increments by 2 instead of 1

models.py

class ModFile(models.Model):
    mod = models.ForeignKey(Mod, on_delete=models.CASCADE)
    title = models.CharField(max_length=128)
    downloads = models.IntegerField(default=0)
    file = models.FileField(upload_to='mods/')

views.py

class downloadMod(APIView):
    def get(self, request, id):
        file = models.ModFile.objects.get(id=id)
        file.downloads += 1
        file.save()
            
        return FileResponse(file.file)

In views.py, the get() function retrieves the model by its id and should increment file.downloads by 1 but for some reason it increments by 2, what am I doing wrong?