Quick deploy and poking, in order: nicer UI; supposedly compatable (sync) but I couldn’t get it working; and no idea never heard of it.
The .env for the compose file is confusing and it slowed my deployment way down, but other than that, it’s pretty painless. The variable names are… not clear. Just delete all the sso stuff unless you use it, set a secret and a db password (no special chars, nothing beyond 100 chars, in my testing/struggle; at least for the db), change the url to your fqdn otherwise it will go to localhost when you log out, and disable registration after you have done it yourself. Import/export from linkding to linkwarden (and I assume vice versa) is fine.
Open hb, edit the affected backup plan, change nothing, okay/save. Happens when you set up a service to be backed up and then uninstall the service.