It's weird that's what I did according to your instructions, it didn't give any errors at all restoring from dump of old database to new, all msgs r showing data imported properly . However, It's just not effective at all. The only explanation to mr is the version was from 3 to 4. And when I ran Mongo dump to the new version of wekan, I always gave out some errors about system versions, and dumped three databases in totals though. Will post some error msg and detailed logs later when I'm home. Maybe you can shed some light. Thx a lot