Почему невозможно найти job id в базе данных?

import time

from apscheduler.schedulers.background import BackgroundScheduler
from django.conf import settings
from django.contrib.sites.models import Site
from django.core.mail import send_mail
from django.template.loader import render_to_string
from django.urls import reverse
from django_apscheduler.jobstores import DjangoJobStore, register_events, register_job

from surveys import models

scheduler = BackgroundScheduler()
scheduler.add_jobstore(DjangoJobStore(), "default")


def send_survey_mail(survey_mail_sent):
    mail_context = {
        'survey_name': survey_mail_sent.survey.name,
        'survey_unique_url': ('' if Site.objects.get_current().domain.startswith(
            'http://') else 'http://') + Site.objects.get_current().domain + reverse('surveys', args=(
            survey_mail_sent.survey.unique_url,))
    }
    mail_new_survey_content = render_to_string('mail/new_survey.html', mail_context)
    send_mail(subject='У вас есть возможность пройти опрос',
              message=mail_new_survey_content,
              html_message=mail_new_survey_content,
              from_email='%s@%s' % (settings.EMAIL_HOST_USER, settings.EMAIL_HOST),
              recipient_list=[survey_mail_sent.user.email])
    survey_mail_sent.is_sent = True
    survey_mail_sent.save()
    return True


@register_job(scheduler, "interval", seconds=settings.APS_INTERVAL_SENT_SECS)
def check_state_is_sent():
    surveys_mail_sent = models.SurveyMailSent.objects.filter(is_sent=False)
    # Начало загрузки операций для отправки сообщений
    for survey_mail_sent in surveys_mail_sent:
        job = scheduler.add_job(send_survey_mail, args=[survey_mail_sent])
    time.sleep(2)


register_events(scheduler)

scheduler.start()
print("Планировщик стартовал!")

Job with id d30d9e376dad47418313d1bcc214d793 not found in database
Job with id 41af402db0d644d79237f6c6e6027ce5 not found in database
Job with id d30d9e376dad47418313d1bcc214d793 not found in database