Geany thinks there is another instance already running and it tells that instance to open the file then exits.
Try deleting the file `/root/.config/geany/geany_socket_puppypc19012__0`.
Also I have to make the usual caveat, it appears you may be runing Geany as root. Geany is not made to be run as root, there may be issues with file ownership and of course its totally insecure, you have been warned.