@gjkrisa : You really saved me here, thanks a lot!
I also arrived here because I asked chatgpt who advised me to do something like zfs send -R rpool@fullbackup | zfs receive -F backup_pool
Well, in my case I got many different mount points on...
I had the same problem (twice! in 3 years), on my backup server, where I pull zfs snapshots from my main server.
The critical part is to set -uand -o mountpoints=none during zfs receive, so that the remote root pool that is mounted to / is not...
ok i fixed it
it was created becasue i asked chat gpt to help me make a backup and it had me make a mount point that my Mirror/backup would mount to / "root directory for rpool"
so to find this:
zfs list -r -o name,mountpoint
i saw that i had one...