diff --git a/todo/migrations/0011_swappable_task.py b/todo/migrations/0011_swappable_task.py
index d94471c..68ce185 100644
--- a/todo/migrations/0011_swappable_task.py
+++ b/todo/migrations/0011_swappable_task.py
@@ -6,85 +6,106 @@ import django.db.models.deletion
 import django.utils.timezone
 
 
+def forward_data_migration(apps, schema_editor):
+    pass
+
+
+def backward_data_migration(apps, schema_editor):
+    pass
+
+
 class Migration(migrations.Migration):
 
     dependencies = [
         migrations.swappable_dependency(settings.AUTH_USER_MODEL),
-        ('todo', '0010_attachment'),
+        ("todo", "0010_attachment"),
     ]
 
     operations = [
-        migrations.AlterModelOptions(
-            name='task',
-            options={},
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='assigned_to',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='completed',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='completed_date',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='created_by',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='created_date',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='due_date',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='id',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='note',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='priority',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='task_list',
-        ),
-        migrations.RemoveField(
-            model_name='task',
-            name='title',
-        ),
         migrations.CreateModel(
-            name='BaseTask',
+            name="BaseTask",
             fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('title', models.CharField(max_length=140)),
-                ('created_date', models.DateField(blank=True, default=django.utils.timezone.now, null=True)),
-                ('due_date', models.DateField(blank=True, null=True)),
-                ('completed', models.BooleanField(default=False)),
-                ('completed_date', models.DateField(blank=True, null=True)),
-                ('note', models.TextField(blank=True, null=True)),
-                ('priority', models.PositiveIntegerField(blank=True, null=True)),
-                ('assigned_to', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='todo_assigned_to', to=settings.AUTH_USER_MODEL)),
-                ('created_by', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='todo_created_by', to=settings.AUTH_USER_MODEL)),
-                ('task_list', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='todo.TaskList')),
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("title", models.CharField(max_length=140)),
+                (
+                    "created_date",
+                    models.DateField(
+                        blank=True,
+                        default=django.utils.timezone.now,
+                        null=True,
+                    ),
+                ),
+                ("due_date", models.DateField(blank=True, null=True)),
+                ("completed", models.BooleanField(default=False)),
+                ("completed_date", models.DateField(blank=True, null=True)),
+                ("note", models.TextField(blank=True, null=True)),
+                (
+                    "priority",
+                    models.PositiveIntegerField(blank=True, null=True),
+                ),
+                (
+                    "assigned_to",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="todo_assigned_to",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "created_by",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="todo_created_by",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+                (
+                    "task_list",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="todo.TaskList",
+                    ),
+                ),
             ],
-            options={
-                'ordering': ['priority', 'created_date'],
-            },
+            options={"ordering": ["priority", "created_date"]},
         ),
+        migrations.RunPython(forward_data_migration, backward_data_migration),
+        migrations.AlterModelOptions(name="task", options={}),
+        migrations.RemoveField(model_name="task", name="assigned_to"),
+        migrations.RemoveField(model_name="task", name="completed"),
+        migrations.RemoveField(model_name="task", name="completed_date"),
+        migrations.RemoveField(model_name="task", name="created_by"),
+        migrations.RemoveField(model_name="task", name="created_date"),
+        migrations.RemoveField(model_name="task", name="due_date"),
+        migrations.RemoveField(model_name="task", name="id"),
+        migrations.RemoveField(model_name="task", name="note"),
+        migrations.RemoveField(model_name="task", name="priority"),
+        migrations.RemoveField(model_name="task", name="task_list"),
+        migrations.RemoveField(model_name="task", name="title"),
         migrations.AddField(
-            model_name='task',
-            name='basetask_ptr',
-            field=models.OneToOneField(auto_created=True, default=1, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='todo.BaseTask'),
+            model_name="task",
+            name="basetask_ptr",
+            field=models.OneToOneField(
+                auto_created=True,
+                default=1,
+                on_delete=django.db.models.deletion.CASCADE,
+                parent_link=True,
+                primary_key=True,
+                serialize=False,
+                to="todo.BaseTask",
+            ),
             preserve_default=False,
         ),
     ]