diff --git a/ereuse_devicehub/resources/lot/models.py b/ereuse_devicehub/resources/lot/models.py
index c2309224..461e7c69 100644
--- a/ereuse_devicehub/resources/lot/models.py
+++ b/ereuse_devicehub/resources/lot/models.py
@@ -7,6 +7,7 @@ from citext import CIText
 from flask import g
 from sqlalchemy import TEXT
 from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import relationship
 from sqlalchemy_utils import LtreeType
 from sqlalchemy_utils.types.ltree import LQUERY
 from teal.db import CASCADE_OWN, IntEnum, UUIDLtree, check_range
@@ -243,6 +244,10 @@ class LotDevice(db.Model):
     )
     author = db.relationship(User, primaryjoin=author_id == User.id)
     author_id.comment = """The user that put the device in the lot."""
+    device = relationship(
+        'Device',
+        primaryjoin='Device.id == LotDevice.device_id',
+    )
 
 
 class Path(db.Model):
diff --git a/scripts/create_placeholders.py b/scripts/create_placeholders.py
index 30a4aad9..7a7f2773 100644
--- a/scripts/create_placeholders.py
+++ b/scripts/create_placeholders.py
@@ -18,6 +18,7 @@ from ereuse_devicehub.resources.action.models import (
     Use,
 )
 from ereuse_devicehub.resources.device.models import Computer, Placeholder
+from ereuse_devicehub.resources.lot.models import LotDevice
 
 app = Devicehub(inventory=DevicehubConfig.DB_SCHEMA)
 app.app_context().push()
@@ -63,9 +64,11 @@ def clone_device(device):
 
     lots = [x for x in device.lots]
     for lot in lots:
-        set_devices = lot.devices - {device}
-        set_devices.add(new_device)
-        lot.devices.update(set_devices)
+        for rel_lot in LotDevice.query.filter_by(lot_id=lot.id, device=device):
+            rel_lot.device = new_device
+        # set_devices = lot.devices - {device}
+        # set_devices.add(new_device)
+        # lot.devices.update(set_devices)
     return new_device