I’ve already read tickets like #16459[1] and #2501[2] but it didn’t help much. Damian says in Ticket #16459
[…] This message is meant to help people who edit their torrc, forget to restart tor, and are then confused why the settings didn't take effect. [...]
I did restart tor (a couple times) and apparently it is running as a Daemon (service --status-all). So I hope this is “just” an issue with arm… Maybe someone of you has an idea?
Hi Jannis, please read further in that ticket:
"I'll either be rewording or dropping the notice in the next release. Iirc Debian does something funky with regard to baking this setting into its tor binary, so in your case it's probably a false alarm due to that."
Probably not something to worry about.