protected function resetOthersConfirmation()
    {
        if (!$this->confirmationAttribute || empty($this->hostClass)) {
            return;
        }
        $contents = static::find()
            ->where([$this->contentAttribute => $this->getContent()])
            ->andWhere(['not like', $this->createdByAttribute, $this->user->getGUID()])
            ->all();
        foreach ($contents as $content) {
            $content->confirmation = static::$confirmFalse;
            $content->save();
        }
    }