Will federated material be updated, after a reinstall?
Will federated material be updated, after a reinstall?
I've set up a Lemmy instance and tested federation by commenting with my Mastodon account on the lemmy instance, which worked.
But I broke the test instance and had to start over (not even once).
The productive instance runs now, but after a few days I figured out that there is still the old post from the old installation on Mastodon and over Mastodon I can't see the new post and no new comments?
It is the same link (older Mastodon post, old Mastodon post, new Lemmy post), but the content is different.
- The post itself doesn't update (it is completely different)
- The comments don't update (different comments)
How to solve this problem? Is it even solvable?
GitHub issue about this topic: https://github.com/LemmyNet/lemmy/issues/3782
Some of it might be avoided by tweaking the PostgreSQL database with higher key values after the new install, but the whole situation isn't really planned for or recognized in the code
1Might it be a good idea to to just copy the post so it gets a higher ID, which wasn't used before? Because the productive system is already running and has a lot of content and a new reinstall might even block more IDs.
1if it were me right now with Lemmy 0.18.4, I'd take the server offline, do a PostgreSQL dump file - keep a copy, then hand-edit the sequence numbers in the dump file - and do a restore.
you probably only had a few users, so I would set user to 100, person id can be higher because of federation - but jump ahead to 10000 maybe. Post and comment set ahead to 10000 ... and community set ahead to 10000 because that gets federated
the PostgreSQL sequence numbers should only get used on newly created objects here-forward.
2