[MM3-users] hyperkitty not archiving new mail

Hello all,

Mailman 3.3.10 on Debian 13.

I recently upgraded from a well-running installation of Mailman2. Importing the existing mailing lists went well but I'm having problems with hyperkitty. First it was complaining that I didn't have a valid SSL certificate for localhost. I rectified that but in the mean time I ended up with some .pck files in /var/lib/mailman3/archives/hyperkitty/spool . Inspecting these with mailman-wrapper qfile reveals that they are messages which have been sent since the import. How do I reindex just those messages? I tried update_index and rebuild_index but apart from taking forever, they don't seem to help.