old_contents: from django.db import models
  
  
  class Application(models.Model):
      app_name = models.CharField(
          max_length=30,
          verbose_name="어플리케이션 이름",
          unique=True,
      )
      slug = models.SlugField(max_length=30)
  
      def __str__(self):
          return self.app_name
  
new_contents: from django.db import models
  
  
  class Application(models.Model):
      app_name = models.CharField(
          max_length=30,
          verbose_name="어플리케이션 이름",
          unique=True,
      )
      slug = models.SlugField(max_length=30)
  
      def __str__(self):
          return self.app_name
  
      class Meta:
          verbose_name = "Application"
          verbose_name_plural = "Application"
  
subject: update Application model