diff --git a/example/migrations/migration-script.py b/example/migrations/migration-script.py
index 7f6c926..f59d927 100644
--- a/example/migrations/migration-script.py
+++ b/example/migrations/migration-script.py
@@ -12,7 +12,7 @@ from django.contrib.auth import get_user_model
 
 from utils.save_snapshots import move_json, save_in_disk
 from evidence.parse import Build
-from evidence.models import Annotation
+from evidence.models import SystemProperty
 from lot.models import Lot, LotTag, DeviceLot
 
 
@@ -85,9 +85,8 @@ def create_custom_id(dhid, uuid, user):
     if not uuid or not dhid:
         return
 
-    tag = Annotation.objects.filter(
+    tag = SystemProperty.objects.filter(
         uuid=uuid,
-        type=Annotation.Type.SYSTEM,
         key='CUSTOM_ID',
         owner=user.institution
     ).first()
@@ -95,9 +94,8 @@ def create_custom_id(dhid, uuid, user):
     if tag or not uuid or not dhid:
         return
 
-    Annotation.objects.create(
+    SystemProperty.objects.create(
         uuid=uuid,
-        type=Annotation.Type.SYSTEM,
         key='CUSTOM_ID',
         value=dhid,
         owner=user.institution,
@@ -137,7 +135,7 @@ def migrate_snapshots(row, user):
 ### migration lots ###
 def migrate_lots(row, user):
     tag = row.get("type", "Temporal")
-    name = row.get("name")
+    name = row.get("lot_name")
     ltag = LotTag.objects.filter(name=tag, owner=user.institution).first()
     if tag and not ltag:
         ltag = LotTag.objects.create(
@@ -146,7 +144,7 @@ def migrate_lots(row, user):
             user=user
         )
 
-    if Lot.objects.filter(name=tag, owner=user.institution).first():
+    if Lot.objects.filter(name=name, owner=user.institution).first():
         return
 
     Lot.objects.create(
@@ -164,8 +162,7 @@ def add_device_in_lot(row, user):
     if not lot_name or not dhid:
         return
 
-    dev = Annotation.objects.filter(
-        type=Annotation.Type.SYSTEM,
+    dev = SystemProperty.objects.filter(
         key='CUSTOM_ID',
         value=dhid,
         owner=user.institution,
diff --git a/example/migrations/migration.sql b/example/migrations/migration.sql
index 1b48a03..0786b7e 100644
--- a/example/migrations/migration.sql
+++ b/example/migrations/migration.sql
@@ -3,7 +3,7 @@
 
 -- save dhids and uuids of snapshots
 copy(
-select d.devicehub_id as dhid, sp.uuid from usody.action_with_one_device as one
+select d.devicehub_id as dhid, sp.uuid as uuid from usody.action_with_one_device as one
   join usody.action as ac on ac.id=one.id
   join usody.device as d on d.id=one.device_id
   join usody.snapshot as sp on sp.id=one.id
@@ -16,7 +16,7 @@ with (format csv, header, delimiter ';', quote '"');
 
 -- save lots and types
 copy(
-select distinct l.name, 'Incoming' from usody.transfer as t
+select distinct l.name as lot_name, 'Incoming' as type from usody.transfer as t
   join usody.lot as l on l.id=t.lot_id
   join common.user as u on u.id=l.owner_id
 where u.email=:'email' and
@@ -26,7 +26,7 @@ where u.email=:'email' and
 with (format csv, header, delimiter ';', quote '"');
 
 copy(
-select distinct l.name, 'Outgoing' from usody.transfer as t
+select distinct l.name as lot_name, 'Outgoing' as type from usody.transfer as t
   join usody.lot as l on l.id=t.lot_id
   join common.user as u on u.id=l.owner_id
 where u.email=:'email' and
@@ -36,7 +36,7 @@ where u.email=:'email' and
 with (format csv, header, delimiter ';', quote '"');
 
 copy(
-select distinct l.name, 'Temporary' from usody.lot as l
+select distinct l.name as lot_name, 'Temporary' as type from usody.lot as l
   left join usody.transfer as t on t.lot_id=l.id
   join common.user as u on u.id=l.owner_id
 where u.email=:'email' and