Dear all,
Someone has commented on the bugreport (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1007965) that they found that the migration failed for mailboxes created more than the 7 years ago. I can confirm that my mailbox are older than 7 years ( and I would be really sad to lose more than 10 years of mails).
They also did a patch.
Do you think it would be possible to add it to reconstruct or relocate_by_id in order to create a clean mailbox.db?
Regards.