JINTAN

検索エンジンインデックス（すべて）でエラーが出る。

いつもお世話になっております。

「検索エンジンインデックス（すべて）」の実行時にエラーが出ており困っております。
エラーの内容は「Entity of type 'Concrete\Core\Entity\File\File' for IDs fID(63) was not found」です。

使い方の方で一度質問して、ファイルマネージャーのID63ファイルが見つからないためのエラーだと教わったのですが、その対処方法が分かりません。

フォーラムで同じ内容がないかと探してもみたのですが見つかりませんでした。
分かる方がいらっしゃいましたら教えていただけないでしょうか。
よろしくお願いします。

環境情報は以下の通りです。
# concrete5 Version
Core Version - 8.2.1
Version Installed - 8.2.1
Database Version - 20170802000000

# concrete5 Packages
Stucco (2.1.3)

# 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/2.2.34

# Server API
cgi-fcgi

# PHP Version
5.6.31

# PHP Extensions
cgi-fcgi, Core, ctype, curl, date, dom, ereg, exif, fileinfo, filter, gd, gettext, gmp, hash, iconv, json, libxml, mbstring, mcrypt, mysql, 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 - 2M
mysql.max_links - Unlimited
mysql.max_persistent - Unlimited
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 - 2000
opcache.max_file_size - 0
opcache.max_wasted_percentage - 5