old_contents: from surveyapp.models import Question, Session
  
  Session.objects.create().save()
  
  Question.objects.create(
      text='What is your favorite programming language',
      type='MC',
      number=1,
      variants=['C#', 'Java', 'Python', 'Go', 'Pascal', 'C++']
  ).save()
  
  Question.objects.create(
      text='How many years do you write code?',
      type='NR',
      number=2,
      variants=[],
  ).save()
  
  Question.objects.create(
      text='Where are you from?',
      type='TE',
      number=3,
      variants=[],
  ).save()
  
new_contents: from surveyapp.models import Question, Session
  
  from django.contrib.auth.models import User
  User.objects.create_superuser('root', 'admin@example.com', 'qwerty123')
  
  Session.objects.create().save()
  
  Question.objects.create(
      text='What is your favorite programming language',
      type='MC',
      number=1,
      variants=['C#', 'Java', 'Python', 'Go', 'Pascal', 'C++']
  ).save()
  
  Question.objects.create(
      text='How many years do you write code?',
      type='NR',
      number=2,
      variants=[],
  ).save()
  
  Question.objects.create(
      text='Where are you from?',
      type='TE',
      number=3,
      variants=[],
  ).save()
  
subject: Update initial data