diff --git a/cvat/apps/engine/migrations/0008_auto_20180917_1424.py b/cvat/apps/engine/migrations/0008_auto_20180917_1424.py
new file mode 100644
index 00000000..cf6b4550
--- /dev/null
+++ b/cvat/apps/engine/migrations/0008_auto_20180917_1424.py
@@ -0,0 +1,20 @@
+# Generated by Django 2.0.3 on 2018-09-17 11:24
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('engine', '0007_task_flipped'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='task',
+            name='owner',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to=settings.AUTH_USER_MODEL),
+        ),
+    ]
diff --git a/cvat/apps/engine/migrations/0009_auto_20180917_1424.py b/cvat/apps/engine/migrations/0009_auto_20180917_1424.py
new file mode 100644
index 00000000..675b0b04
--- /dev/null
+++ b/cvat/apps/engine/migrations/0009_auto_20180917_1424.py
@@ -0,0 +1,49 @@
+# Generated by Django 2.0.3 on 2018-09-17 11:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('engine', '0008_auto_20180917_1424'),
+    ]
+
+    operations = [
+        migrations.RunSQL('ALTER TABLE "engine_objectpath" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_objectpathattributeval" ALTER COLUMN "track_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedbox" ALTER COLUMN "track_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpoints" ALTER COLUMN "track_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpolygon" ALTER COLUMN "track_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpolyline" ALTER COLUMN "track_id" TYPE bigint;'),
+
+        migrations.RunSQL('ALTER TABLE "engine_trackedbox" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpoints" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpolygon" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpolyline" ALTER COLUMN "id" TYPE bigint;'),
+
+        migrations.RunSQL('ALTER TABLE "engine_trackedboxattributeval" ALTER COLUMN "box_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpointsattributeval" ALTER COLUMN "points_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpolygonattributeval" ALTER COLUMN "polygon_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpolylineattributeval" ALTER COLUMN "polyline_id" TYPE bigint;'),
+
+        migrations.RunSQL('ALTER TABLE "engine_trackedboxattributeval" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpointsattributeval" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpolygonattributeval" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_trackedpolylineattributeval" ALTER COLUMN "id" TYPE bigint;'),
+
+        migrations.RunSQL('ALTER TABLE "engine_labeledbox" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpoints" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpolygon" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpolyline" ALTER COLUMN "id" TYPE bigint;'),
+
+        migrations.RunSQL('ALTER TABLE "engine_labeledboxattributeval" ALTER COLUMN "box_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpointsattributeval" ALTER COLUMN "points_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpolygonattributeval" ALTER COLUMN "polygon_id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpolylineattributeval" ALTER COLUMN "polyline_id" TYPE bigint;'),
+
+        migrations.RunSQL('ALTER TABLE "engine_labeledboxattributeval" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpointsattributeval" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpolygonattributeval" ALTER COLUMN "id" TYPE bigint;'),
+        migrations.RunSQL('ALTER TABLE "engine_labeledpolylineattributeval" ALTER COLUMN "id" TYPE bigint;'),
+    ]