fix add interface

check_vchassis_stack_ports.py

@@ -52,7 +52,6 @@ class Vchassis_checker(Script):
         interfaces_qs = Interface.objects.filter(
             device_id__in=device_ids
         ).select_related("device")
-
         to_update = []
         for iface in interfaces_qs:
             m = self.IFACE_RE.match(iface.name)
@@ -61,6 +60,7 @@ class Vchassis_checker(Script):
                 slot = m.group("slot")
                 rest = m.group("rest")
                 iface.name = f"{prefix}{iface.device.vc_position}/{rest}"
+                to_update.append(iface)
         if commit:
             Interface.objects.bulk_update(to_update, fields=["name"], batch_size=100)
             vc.tags.add(tag)