I found that package acme (based on acme.sh) and uacme(baed on https://github.com/ndilieto/uacme)'s rapper using same config file path, /etc/config/acme. looks like later try to use same path , and duce uci path colides. it looks like later tried to be able to use same config for fommer. but I didn't check if it actually competeable
I can try to move one's config file to look at differernt filename, but it would break anyone used older version of that package.
edit: luci-app-acme try to support both acme and uacme, but it hard depend only on formal