new_contents: # Generated by Django 2.2.16 on 2020-10-28 10:20
  
  from django.db import migrations, models
  import django.db.models.deletion
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('projects', '0042_allow_site_null'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='project',
              name='catalog',
              field=models.ForeignKey(help_text='The catalog which will be used for this project.', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='projects', to='questions.Catalog', verbose_name='Catalog'),
          ),
      ]
  
subject: Add migration