def METHOD_NAME(self, containers):
    if self.id and self.sysname:
        other = manage.Netbox.objects.filter(
            ~Q(id=self.id), Q(sysname=self.sysname)
        )
        if not other:
            return
        else:
            other = other[0]
        liveself = self.get_existing_model(containers)
        self._logger.warning(
            "%s and %s both appear to resolve to the same DNS name (%s)."
            "Are they the same device? Setting sysname = IP Address to "
            "avoid conflicts",
            liveself.ip,
            other.ip,
            self.sysname,
        )
        self.sysname = liveself.ip