diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 4d934dfb..37accbe6 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -300,13 +300,13 @@ class UploadSnapshotForm(SnapshotMixin, FlaskForm):
 
             try:
                 snapshot_json = schema.load(snapshot_json)
+                response = self.build(snapshot_json)
             except ValidationError as err:
                 txt = "{}".format(err)
                 self.errors(txt=txt)
                 self.result[filename] = 'Error'
                 continue
 
-            response = self.build(snapshot_json)
             db.session.add(response)
             devices.append(response.device.binding.device)
 
diff --git a/ereuse_devicehub/resources/device/sync.py b/ereuse_devicehub/resources/device/sync.py
index 926b3238..90403871 100644
--- a/ereuse_devicehub/resources/device/sync.py
+++ b/ereuse_devicehub/resources/device/sync.py
@@ -32,6 +32,13 @@ DEVICES_ALLOW_DUPLICITY = [
     'GraphicCard',
 ]
 
+err_motherboard = "Error: We have detected that a there is a device"
+err_motherboard += " in your inventory with this system UUID. "
+err_motherboard += "We proceed to block this snapshot to prevent its"
+err_motherboard += " information from being updated incorrectly."
+err_motherboard += " The solution we offer you to inventory this device "
+err_motherboard += "is to do it by creating a placeholder."
+
 
 class Sync:
     """Synchronizes the device and components with the database."""
@@ -70,6 +77,17 @@ class Sync:
                  2. A list of Add / Remove (not yet added to session).
         """
         db_device = self.execute_register(device)
+        motherboard = None
+        if components:
+            for c in components:
+                if c.type == "Motherboard":
+                    motherboard = c
+
+        if motherboard:
+            for c in db_device.components:
+                if c.type == "Motherboard" and motherboard.hid != c.hid:
+                    raise ValidationError(err_motherboard)
+
         db_components, actions = OrderedSet(), OrderedSet()
         if components is not None:  # We have component info (see above)
             if not isinstance(db_device, Computer):
diff --git a/tests/test_render_2_0.py b/tests/test_render_2_0.py
index 9d344b38..d6ac6a6e 100644
--- a/tests/test_render_2_0.py
+++ b/tests/test_render_2_0.py
@@ -12,6 +12,7 @@ from flask_wtf.csrf import generate_csrf
 from ereuse_devicehub.client import UserClient, UserClientFlask
 from ereuse_devicehub.db import db
 from ereuse_devicehub.devicehub import Devicehub
+from ereuse_devicehub.parser.models import SnapshotsLog
 from ereuse_devicehub.resources.action.models import Snapshot
 from ereuse_devicehub.resources.device.models import Device, Placeholder
 from ereuse_devicehub.resources.lot.models import Lot
@@ -2605,3 +2606,36 @@ def test_new_register(user3: UserClientFlask, app: Devicehub):
     assert status == '200 OK'
     assert "Your new user is activate" in body
     assert user_valid.user.active
+
+
+@pytest.mark.mvp
+@pytest.mark.usefixtures(conftest.app_context.__name__)
+def test_system_uuid_motherboard(user3: UserClientFlask):
+    # we want to do an snapshot log when there are the same system-uuid for
+    # 2 computers with diferent motherboard
+    snapshot = create_device(user3, 'real-eee-1001pxd.snapshot.12.json')
+
+    uri = '/inventory/upload-snapshot/'
+    file_name = 'real-eee-1001pxd.snapshot.12'
+    snapshot_json = conftest.yaml2json(file_name)
+    snapshot_json['uuid'] = 'c058e8d2-fb92-47cb-a4b7-522b75561136'
+    for c in snapshot_json['components']:
+        if c['type'] == 'Motherboard':
+            c['serialNumber'] = 'ABee0123456720'
+    b_snapshot = bytes(json.dumps(snapshot_json), 'utf-8')
+    file_snap = (BytesIO(b_snapshot), file_name)
+    user3.get(uri)
+
+    data = {
+        'snapshot': file_snap,
+        'csrf_token': generate_csrf(),
+    }
+    user3.post(uri, data=data, content_type="multipart/form-data")
+    snapshot2 = Snapshot.query.filter_by(uuid=snapshot_json['uuid']).first()
+    assert snapshot2 is None
+    for c in snapshot.device.components:
+        if c.type == 'Motherboard':
+            assert c.serial_number == 'eee0123456720'
+
+    txt = "We have detected that a there is a device in your inventory"
+    assert txt in SnapshotsLog.query.all()[-1].description
diff --git a/tests/test_snapshot.py b/tests/test_snapshot.py
index f7a31cce..a4753943 100644
--- a/tests/test_snapshot.py
+++ b/tests/test_snapshot.py
@@ -1365,3 +1365,18 @@ def test_placeholder_actions(user: UserClient):
     assert dev.binding.device.actions == []
     assert len(dev.components[0].actions) == 3
     assert len(dev.binding.device.components[0].actions) == 0
+
+
+@pytest.mark.usefixtures(conftest.app_context.__name__)
+def test_system_uuid_motherboard(user: UserClient):
+    """This test the actions of a placeholder of one snapshot"""
+    s = yaml2json('real-eee-1001pxd.snapshot.12')
+    snap1, _ = user.post(s, res=Snapshot)
+
+    for c in s['components']:
+        if c['type'] == 'Motherboard':
+            c['serialNumber'] = 'ABee0123456720'
+
+    snap2, _ = user.post(s, res=Snapshot, status=422)
+    txt = "We have detected that a there is a device in your inventory"
+    assert txt in snap2['message'][0]