tsuji様
ご回答ありがとうございます。
仰る通り「限定品ではありません」が表示されています。
(キャッシュは管理画面からクリアしており、sshでもコマンドでクリアしてあります。)

デバッグモードで開いてみましたが申し訳ありませんが見方が分からないです。
hasTagというプロパティのメソッドが存在しないと書いてあるのは分かるのですがどこを直せば良いのかが分かりません。
内容を記載するのでご助言頂けると大変助かります。
よろしくお願いいたします。

▼RuntimeError(line 389)

389行目　{% if Product.hasTag(3) %}

// line 389
if (twig_get_attribute($this->env, $this->source, (isset($context["Product"]) || array_key_exists("Product", $context) ? $context["Product"] : (function () { throw new RuntimeError('Variable "Product" does not exist.', 389, $this->source); })()), "hasTag", [0 => 3], "method", false, false, false, 389)) {

Twig\Error\RuntimeError:
Neither the property "hasTag" nor one of the methods "hasTag()", "gethasTag()"/"ishasTag()"/"hashasTag()" or "__call()" exist and have public access in class "Eccube\Entity\Product".

▼Logsのページ

INFO
php
User Deprecated: The "base_template_class" option on Twig\Environment is deprecated since Twig 2.7.0.

INFO
php
User Deprecated: Creating Doctrine\ORM\Mapping\UnderscoreNamingStrategy without making it number aware is deprecated and will be removed in Doctrine ORM 3.0.

INFO
php
User Deprecated: The type "datetime" was implicitly marked as commented due to the configuration. This is deprecated and will be removed in DoctrineBundle 2.0. Either set the "commented" attribute in the configuration to "false" or mark the type as commented in "Eccube\Doctrine\DBAL\Types\UTCDateTimeType::requiresSQLCommentHint()."

INFO
php
User Deprecated: The type "datetimetz" was implicitly marked as commented due to the configuration. This is deprecated and will be removed in DoctrineBundle 2.0. Either set the "commented" attribute in the configuration to "false" or mark the type as commented in "Eccube\Doctrine\DBAL\Types\UTCDateTimeTzType::requiresSQLCommentHint()."