NFS directory is no longer mounted but throws an error in df -h?

i have nfs server (at say, 1.2.3.4), , several clients.

on clients, had mounted local directory executing:

sudo mount 1.2.3.4:/var/nfs/stuff /mnt/nfs/var/nfs

all until decided change location on clients /mnt/nfs. first unmounted existing mount point , remounted new one:

sudo mount 1.2.3.4:/var/nfs/stuff /mnt/nfs

no problems that. , new mount works fine. when run df -h, error:

df: ‘/mnt/nfs/var/nfs’: no such file or directory

and prints normal mount points. when execute:

mount -t nfs

i still see old (/mnt/nfs/var/nfs) mount point listed, along new one. how can fix this?

Primitatvve