class CompetitionRommList(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
is_private = models.BooleanField(default=False)
about = models.TextField()
amount = models.FloatField(default=10000)
if your model class content any other reference object like forging key and you try to direct stock hole reference object than djongo throw the error. Solution is try to store object values rather than hole object.