diff --git a/django_etesync/migrations/0008_auto_20200526_1535.py b/django_etesync/migrations/0008_auto_20200526_1535.py
new file mode 100644
index 0000000..e544bdd
--- /dev/null
+++ b/django_etesync/migrations/0008_auto_20200526_1535.py
@@ -0,0 +1,28 @@
+# Generated by Django 3.0.3 on 2020-05-26 15:35
+
+import django.core.validators
+from django.db import migrations, models
+import django.db.models.deletion
+import django_etesync.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0007_auto_20200526_1336'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Stoken',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('uid', models.CharField(db_index=True, default=django_etesync.models.generate_stoken_uid, max_length=43, unique=True, validators=[django.core.validators.RegexValidator(message='Expected a base64url.', regex='^[a-zA-Z0-9\\-_]{42,43}$')])),
+            ],
+        ),
+        migrations.AddField(
+            model_name='collectionitemrevision',
+            name='stoken',
+            field=models.OneToOneField(null=True, on_delete=django.db.models.deletion.PROTECT, to='django_etesync.Stoken'),
+        ),
+    ]
diff --git a/django_etesync/migrations/0009_auto_20200526_1535.py b/django_etesync/migrations/0009_auto_20200526_1535.py
new file mode 100644
index 0000000..53100b3
--- /dev/null
+++ b/django_etesync/migrations/0009_auto_20200526_1535.py
@@ -0,0 +1,23 @@
+# Generated by Django 3.0.3 on 2020-05-26 15:35
+
+from django.db import migrations
+
+
+def create_stokens(apps, schema_editor):
+    Stoken = apps.get_model('django_etesync', 'Stoken')
+    CollectionItemRevision = apps.get_model('django_etesync', 'CollectionItemRevision')
+
+    for rev in CollectionItemRevision.objects.all():
+        rev.stoken = Stoken.objects.create()
+        rev.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0008_auto_20200526_1535'),
+    ]
+
+    operations = [
+        migrations.RunPython(create_stokens),
+    ]
diff --git a/django_etesync/migrations/0010_auto_20200526_1539.py b/django_etesync/migrations/0010_auto_20200526_1539.py
new file mode 100644
index 0000000..c894fd2
--- /dev/null
+++ b/django_etesync/migrations/0010_auto_20200526_1539.py
@@ -0,0 +1,19 @@
+# Generated by Django 3.0.3 on 2020-05-26 15:39
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0009_auto_20200526_1535'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='collectionitemrevision',
+            name='stoken',
+            field=models.OneToOneField(on_delete=django.db.models.deletion.PROTECT, to='django_etesync.Stoken'),
+        ),
+    ]