import django.db.models.deletion from django.db import migrations, models class Migration(migrations.Migration): dependencies = [ ('core', '0019_configrevision_active'), ('users', '0015_owner'), ] operations = [ migrations.AddField( model_name='datasource', name='owner', field=models.ForeignKey( blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='users.owner' ), ), ]