diff --git a/ereuse_devicehub/resources/device/sync.py b/ereuse_devicehub/resources/device/sync.py
index ecf5690e..df02d451 100644
--- a/ereuse_devicehub/resources/device/sync.py
+++ b/ereuse_devicehub/resources/device/sync.py
@@ -88,6 +88,7 @@ class Sync:
             # We only want to perform Add/Remove to not new components
             actions = self.add_remove(db_device, not_new_components)
             db_device.components = db_components
+            self.create_placeholder(db_device)
         return db_device, actions
 
     def execute_register_component(
@@ -235,7 +236,6 @@ class Sync:
         else:  # Device is new and tags are not linked to a device
             device.tags.clear()  # We don't want to add the transient dummy tags
             db.session.add(device)
-            self.create_placeholder(device)
             db_device = device
         db_device.tags |= (
             tags  # Union of tags the device had plus the (potentially) new ones
@@ -283,15 +283,26 @@ class Sync:
     @staticmethod
     def create_placeholder(device: Device):
         """If the device is new, we need create automaticaly a new placeholder"""
-        # import pdb; pdb.set_trace()
+        if device.binding:
+            return
         dict_device = copy.copy(device.__dict__)
         dict_device.pop('_sa_instance_state')
+        dict_device.pop('id', None)
+        dict_device.pop('devicehub_id', None)
+        dict_device.pop('actions_multiple', None)
+        dict_device.pop('actions_one', None)
+        dict_device.pop('components', None)
         dev_placeholder = device.__class__(**dict_device)
         for c in device.components:
             c_dict = copy.copy(c.__dict__)
             c_dict.pop('_sa_instance_state')
+            c_dict.pop('id', None)
+            c_dict.pop('devicehub_id', None)
+            c_dict.pop('actions_multiple', None)
+            c_dict.pop('actions_one', None)
             c_placeholder = c.__class__(**c_dict)
             c_placeholder.parent = dev_placeholder
+            c.parent = device
             component_placeholder = Placeholder(device=c_placeholder, binding=c)
             db.session.add(c_placeholder)
             db.session.add(component_placeholder)
diff --git a/tests/test_snapshot.py b/tests/test_snapshot.py
index a3183533..a6738711 100644
--- a/tests/test_snapshot.py
+++ b/tests/test_snapshot.py
@@ -1311,5 +1311,42 @@ def test_snapshot_check_tests_lite(user: UserClient):
 
     bodyLite, res = user.post(snapshot_lite, uri="/api/inventory/")
     assert res.status_code == 201
-    SnapshotsLog.query.all()
+    assert SnapshotsLog.query.count() == 1
+    m.Device.query.filter_by(devicehub_id=bodyLite['dhid']).one()
+
+
+@pytest.mark.usefixtures(conftest.app_context.__name__)
+def test_placeholder(user: UserClient):
+    """This check the structure of one placeholder generated automatically by a snapshot"""
+    snapshot_lite = file_json(
+        'test_lite/2022-4-13-19-5_user@dhub.com_b27dbf43-b88a-4505-ae27-10de5a95919e.json'
+    )
+
+    bodyLite, res = user.post(snapshot_lite, uri="/api/inventory/")
+    assert res.status_code == 201
     dev = m.Device.query.filter_by(devicehub_id=bodyLite['dhid']).one()
+    assert dev.placeholder is None
+    assert dev.binding.phid == '12'
+    assert len(dev.binding.device.components) == 11
+    assert len(dev.components) == 11
+    assert dev.binding.device.placeholder == dev.binding
+    assert dev.components != dev.binding.device.components
+    assert dev.binding.device.actions == []
+
+
+@pytest.mark.usefixtures(conftest.app_context.__name__)
+def test_placeholder_actions(user: UserClient):
+    """This test the actions of a placeholder of one snapshot"""
+    s = yaml2json('erase-sectors.snapshot')
+    snap1, _ = user.post(s, res=Snapshot)
+
+    dev = m.Device.query.filter_by(id=snap1['device']['id']).one()
+    assert dev.placeholder is None
+    assert dev.binding.phid == '4'
+    assert len(dev.binding.device.components) == 3
+    assert len(dev.components) == 3
+    assert dev.binding.device.placeholder == dev.binding
+    assert dev.components != dev.binding.device.components
+    assert dev.binding.device.actions == []
+    assert len(dev.components[0].actions) == 3
+    assert len(dev.binding.device.components[0].actions) == 0