https://blog.wongcw.com/2020/01/09/nextcloud-%e5%ae%89%e5%85%a8%e5%8f%8a%e8%a8%ad%e7%bd%ae%e8%ad%a6%e5%91%8a%e4%b9%8bocc-dbconvert-filecache-bigint/
Nextcloud 安全及設置警告之occ db:convert-filecache-bigint