pvesm add - ZFS error: dataset does not exist (500)

[Koleon]

Hello Proxmox team,

Recently, I've been learning more about the Proxmox VE Storage Manager and other Proxmox internal commands.
I was curious about how to create a dataset using the pvesm command instead of WebUI.

Firstly, I created a dataset on my ZFS pool, added it via Datacenter > Storage > Add > ZFS, and filled in all the details. Then I checked the /etc/pve/storage.cfg showing:

zfspool: nc-data
        pool rpool/ncdata
        blocksize 12k
        content rootdir,images
        mountpoint /rpool/nc-data
        sparse 1

On the other hand, adding the same storage using pvesm add zfspool nc-data --pool rpool/ncdata --content rootdir,images --sparse true --blocksize 12k creates:

zfspool: nc-data
        pool rpool/ncdata
        blocksize 12k
        content rootdir,images
        sparse 1

The missing mountpoint settings cause "zfs error: cannot open 'rpool/ncdata': dataset does not exist (500)" in WebUI. Is this a bug or feature? As the first method - creating the storage via WebUI does not ask for a mountpoint path.