Trouble with a sample

[C K Kashyap]

Hi,
I was trying out the guestbook example here -
https://dev.to/cess11/lets-build-a-picolisp-guestbook-mkl I noticed that
the changes to the DB only get affected across sessions only after restart
the service. I mean, I add some data in a browser session and it shows up
at the bottom as expected, however, they disappear if I revisit the site
from another tab.
I would really appreciate it if someone could point out what's going on.
Regards,
Kashyap