public function hasUniqueHash()
    {
        $hash = $this->hashWorkingRecord->{$this->hashDbField} ?: $this->encrypt();

        $list = $this->hashWorkingRecord->get()->filter($this->hashDbField, $hash);

        if($this->hashWorkingRecord->ID) {
            $list = $list->exclude('ID', $this->hashWorkingRecord->ID);
        }

        return !($list->exists());
    }