Ignore/reset zfs mountpoint property on ZFS replication task

During ZFS replication tasks, I find that the task never completes. I had a PULL task set up from my laptop, danube (pool NX72003) to my FreeNAS, luna, running 11.3u5 (pool NX80101).

The pool on luna is in /mnt/NX80101, and the replication task is set to go into /mnt/NX80101/archive/danube/NX72003. Once started, however it gets to a certain point, and the task fails because it can no longer see /mnt/NX80101/archive/danube/NX72003, because the directory under /mnt instead of looking like

root@luna[~]# ls -l /mnt  
total 21
-rw-r--r--   1 root  wheel   5 Sep 29 19:10 md_size
drwxr-xr-x  17 root  wheel  17 Sep 29 21:23 NX80101
 

it appears to be the root directory of my laptop:

root@luna[~]# ls -l /mnt

total 189
-rw-r--r--   2 root  wheel   951 Nov  8  2019 .cshrc
drwx------   3 root  wheel     3 Jan 22  2019 .dbus
-rw-r--r--   2 root  wheel   470 Nov  8  2019 .profile
drwxr-xr-x   2 root  wheel    46 Oct  5 21:02 bin
drwxr-xr-x  10 root  wheel    63 Oct 14 19:04 boot
-r--r--r--   1 root  wheel  6181 Nov  8  2019 COPYRIGHT
drwxr-xr-x   2 root  wheel     2 Jan 22  2019 dev
-rw-------   1 root  wheel  4096 Oct 14 19:07 entropy
drwxr-xr-x  25 root  wheel   110 Sep 19 13:30 etc
drwxr-xr-x   4 root  wheel     4 Jun 11 20:17 exports
lrwxr-xr-x   1 root  wheel     8 Jan 22  2019 home -> usr/home
drwxr-xr-x   2 root  wheel     2 Mar  5  2019 justman
drwxr-xr-x   5 root  wheel    62 May 12 19:05 lib
drwxr-xr-x   3 root  wheel     5 Nov  8  2019 libexec
drwxr-xr-x   2 root  wheel     2 Jun 28 21:49 media
drwxr-xr-x   2 root  wheel     2 Feb  2  2019 mnt
drwxr-xr-x   2 root  wheel     2 Dec  6  2018 net
dr-xr-xr-x   2 root  wheel     2 Dec  6  2018 proc
drwxr-xr-x   2 root  wheel   150 Sep 12 21:09 rescue
drwxr-xr-x   6 root  wheel    20 Oct 14 19:08 root
drwxr-xr-x   2 root  wheel   139 Oct  5 22:25 sbin
lrwxr-xr-x   1 root  wheel    11 Dec  6  2018 sys -> usr/src/sys
drwxr-xr-x   2 root  wheel     2 Jan 22  2019 tmp
drwxr-xr-x  17 root  wheel    17 Nov 30  2019 usr
drwxr-xr-x  25 root  wheel    26 Oct 14 19:07 var

This reverts after reboot, but will not allow the replication to complete.

I have attached the log of the attempt.