diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index 82adf8e7..df331e70 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -745,7 +745,7 @@ class Device(Thing):
 
         return ""
 
-    def set_hid(self):
+    def set_new_hid(self):
         """
         The order is important
         # product_vendor, is a manufacturer
@@ -814,7 +814,18 @@ class Device(Thing):
         if self.hid:
             return hashlib.sha3_512(self.hid.encode()).hexdigest()
 
-    def set_old_hid(self):
+    def get_from_db(self):
+        if not self.hid:
+            return
+
+        return Device.query.filter_by(
+            hid=self.hid,
+            owner_id=g.user.id,
+            active=True,
+            placeholder=None,
+        ).first()
+
+    def set_hid(self):
         with suppress(TypeError):
             self.hid = Naming.hid(
                 self.type, self.manufacturer, self.model, self.serial_number
diff --git a/ereuse_devicehub/resources/device/schemas.py b/ereuse_devicehub/resources/device/schemas.py
index e34502f5..76a1fee2 100644
--- a/ereuse_devicehub/resources/device/schemas.py
+++ b/ereuse_devicehub/resources/device/schemas.py
@@ -208,21 +208,6 @@ class Computer(Device):
     receiver_id = UUID(data_key='receiverID')
     system_uuid = UUID(required=False)
 
-    @post_load
-    def validate_hid(self, data):
-        """Validates than exist model manufacturer and system_uuid."""
-
-        minimum = [
-            data.get('manufacturer'),
-            data.get('model'),
-            data.get('system_uuid'),
-        ]
-
-        if not all(minimum):
-            txt = 'You can not register one device with out minimum datas, '
-            txt += 'you can to do one placeholder.'
-            raise ValidationError(txt)
-
 
 class Desktop(Computer):
     __doc__ = m.Desktop.__doc__
diff --git a/ereuse_devicehub/resources/device/sync.py b/ereuse_devicehub/resources/device/sync.py
index 65731583..f88a62ba 100644
--- a/ereuse_devicehub/resources/device/sync.py
+++ b/ereuse_devicehub/resources/device/sync.py
@@ -212,19 +212,10 @@ class Sync:
                         placeholder=None,
                     ).one()
             # if no there are any Computer by uuid search by hid
-            if not db_device and device.hid:
-                with suppress(ResourceNotFound):
-                    db_device = Device.query.filter_by(
-                        hid=device.hid,
-                        owner_id=g.user.id,
-                        active=True,
-                        placeholder=None,
-                    ).one()
+            if not db_device:
+                db_device = device.get_from_db()
         elif device.hid:
-            with suppress(ResourceNotFound):
-                db_device = Device.query.filter_by(
-                    hid=device.hid, owner_id=g.user.id, active=True, placeholder=None
-                ).one()
+            db_device = device.get_from_db()
 
         if db_device and db_device.allocated:
             raise ResourceNotFound('device is actually allocated {}'.format(device))