tinysshd fails when keydir exists
Starting the /etc/init.d/tinysshd service fails when the SSH keydir exists (default location at /etc/tinyssh/sshkeys), effectively making it impossible to restart the service without modifying the init script.
Easiest fix would be to have start_pre() in the script run tinysshd-keygen only if $keydir does not already exist.
(from redmine: issue id 9550, created on 2018-10-11, closed on 2019-05-04)