Update migration again

server/portfolio/migrations/0006_auto_20210810_1348.py

@@ -5,10 +5,11 @@ from django.db import migrations
 
 def set_default_school_class(apps, schema_editor):
     Project = apps.get_model('portfolio', 'Project')
+    User = apps.get_model('user', 'User')
     projects = Project.objects.all()
     bulk_projects = []
     for project in projects:
-        owner = project.student
+        owner = User.objects.get(id=project.student.id)
         selected_class = owner._get_selected_class()
         if selected_class is not None:
             project.school_class = selected_class