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concrete5 8.4.1をPHP7.2でエラー

concrete5 8.4.1 がリリースされたのでアップデートを行い、そのついでにPHPも7.2にしてみました。
その後にサイトを確認すると、下記のエラーが。

Cannot use Concrete\Core\Foundation\Object as Object because 'Object' is a special class name

サイトを２つ運営しているのでまとめてアップデートしたのですが、片方だけエラーが出てしまいました。
エラーが出た方もPHPを7.1にすると問題なく動きます。

考えられる原因はなんでしょうか。

【エラーが出ないサイトの環境情報】
# concrete5 Version
Core Version - 8.4.1
Version Installed - 8.4.1
Database Version - 20180710203437

# concrete5 Packages
Stucco (2.1.6)

# concrete5 Overrides
blocks/core_area_layout, blocks/page_list/templates, blocks/page_list, themes/stucco/css/img/headeing_dot.svg, themes/stucco/css/img/page_top_arrow.png, themes/stucco/css/img, themes/stucco/css/build/mobile/navigation.less, themes/stucco/css/build/mobile, themes/stucco/css/build/fonts/tomekon.less, themes/stucco/css/build/fonts/defaults.less, themes/stucco/css/build/fonts/ruri.less, themes/stucco/css/build/fonts/akane.less, themes/stucco/css/build/fonts/hisui.less, themes/stucco/css/build/fonts, themes/stucco/css/build/blocks/page-list.less, themes/stucco/css/build/blocks/social-button.less, themes/stucco/css/build/blocks/image-slider.less, themes/stucco/css/build/blocks/testimonial.less, themes/stucco/css/build/blocks/express_entry_list.less, themes/stucco/css/build/blocks/feature.less, themes/stucco/css/build/blocks/topic-list.less, themes/stucco/css/build/blocks/faq.less, themes/stucco/css/build/blocks/express_entry_detail.less, themes/stucco/css/build/blocks, themes/stucco/css/build/search.less, themes/stucco/css/build/header.less, themes/stucco/css/build/global-nav.less, themes/stucco/css/build/common.less, themes/stucco/css/build/breadcrumb.less, themes/stucco/css/build/footer.less, themes/stucco/css/build/pagination.less, themes/stucco/css/build/front-page.less, themes/stucco/css/build, themes/stucco/css/presets/tomekon.less, themes/stucco/css/presets/defaults.less, themes/stucco/css/presets/ruri.less, themes/stucco/css/presets/akane.less, themes/stucco/css/presets/hisui.less, themes/stucco/css/presets, themes/stucco/css/bootstrap-theme.min.css, themes/stucco/css/bootstrap.css, themes/stucco/css/styles.xml, themes/stucco/css/main.less, themes/stucco/css, themes/stucco/fonts/glyphicons-halflings-regular.woff, themes/stucco/fonts/glyphicons-halflings-regular.eot, themes/stucco/fonts/glyphicons-halflings-regular.svg, themes/stucco/fonts/glyphicons-halflings-regular.ttf, themes/stucco/fonts, themes/stucco/inc/header_home.php, themes/stucco/inc/header_top.php, themes/stucco/inc/header.php, themes/stucco/inc/footer.php, themes/stucco/inc, themes/stucco/js/vendor/modernizr-2.8.3-respond-1.4.2.min.js, themes/stucco/js/vendor, themes/stucco/js/main.js, themes/stucco/js, themes/stucco/blank.php, themes/stucco/default.php, themes/stucco/description.txt, themes/stucco/full.php, themes/stucco/home.php, themes/stucco/left_sidebar.php, themes/stucco/page_forbidden.php, themes/stucco/page_not_found.php, themes/stucco/page_theme.php, themes/stucco/right_sidebar.php, themes/stucco/thumbnail.png, themes/stucco/view.php, themes/stucco

# concrete5 Cache Settings
Block Cache - On
Overrides Cache - On
Full Page Caching - On - If blocks on the particular page allow it.
Full Page Cache Lifetime - Every 6 hours (default setting).

# Server Software
Apache

# Server API
cgi-fcgi

# PHP Version
7.2.7

# PHP Extensions
apcu, cgi-fcgi, Core, ctype, curl, date, dom, exif, fileinfo, filter, gd, gettext, gmp, hash, iconv, intl, json, libxml, mbstring, mcrypt, mysqli, mysqlnd, openssl, pcre, PDO, pdo_mysql, pdo_sqlite, Phar, posix, Reflection, session, SimpleXML, snmp, soap, SPL, sqlite3, standard, tokenizer, xml, xmlreader, xmlwriter, xsl, Zend OPcache, zip, zlib

# PHP Settings
max_execution_time - 30
log_errors_max_len - 1024
max_file_uploads - 20
max_input_nesting_level - 64
max_input_time - -1
max_input_vars - 1000
memory_limit - 128M
post_max_size - 8M
upload_max_filesize - 2M
mysqli.max_links - Unlimited
mysqli.max_persistent - Unlimited
pcre.backtrack_limit - 1000000
pcre.recursion_limit - 100000
session.cache_limiter - no value
session.gc_maxlifetime - 7200
soap.wsdl_cache_limit - 5
opcache.max_accelerated_files - 10000
opcache.max_file_size - 0
opcache.max_wasted_percentage - 5


【エラーが出る方の環境情報】
# concrete5 Version
Core Version - 8.4.1
Version Installed - 8.4.1
Database Version - 20180710203437

# concrete5 Packages
Cloneamental (0.9.3), Manual Nav (2.2.0), Stucco (2.1.6), Supermint Theme (3.4.1.3)

# concrete5 Overrides
blocks/manual_nav/templates/manual_nav_topnav/view.php, blocks/manual_nav/templates/manual_nav_topnav, blocks/manual_nav/templates, blocks/manual_nav

# concrete5 Cache Settings
Block Cache - On
Overrides Cache - On
Full Page Caching - On - If blocks on the particular page allow it.
Full Page Cache Lifetime - Every 6 hours (default setting).

# Server Software
Apache

# Server API
cgi-fcgi

# PHP Version
7.1.19

# PHP Extensions
apcu, cgi-fcgi, Core, ctype, curl, date, dom, exif, fileinfo, filter, gd, gettext, gmp, hash, iconv, intl, json, libxml, mbstring, mcrypt, mysqli, mysqlnd, openssl, pcre, PDO, pdo_mysql, pdo_sqlite, Phar, posix, Reflection, session, SimpleXML, snmp, soap, SPL, sqlite3, standard, tokenizer, xml, xmlreader, xmlwriter, xsl, Zend OPcache, zip, zlib

# PHP Settings
max_execution_time - 30
log_errors_max_len - 1024
max_file_uploads - 20
max_input_nesting_level - 64
max_input_time - -1
max_input_vars - 1000
memory_limit - 128M
post_max_size - 8M
sql.safe_mode - Off
upload_max_filesize - 30M
mysqli.max_links - Unlimited
mysqli.max_persistent - Unlimited
pcre.backtrack_limit - 1000000
pcre.recursion_limit - 100000
session.cache_limiter - no value
session.gc_maxlifetime - 7200
soap.wsdl_cache_limit - 5
opcache.max_accelerated_files - 10000
opcache.max_file_size - 0
opcache.max_wasted_percentage - 5