Can not change ISCSI disk mount point to other directory

Problem: I can not change ISCSI disk mount point to other directory.

Currently I have ISCSI disk mounted to /iscsi2

I would like to change it to /iscsi

I changed /iscsi2 to /iscsi in /etc/fstab, but mounting to /iscsi is unsuccessful.

Reproducing steps:

1. Mount /iscsi2 based on /etc/fstab. Failed, because mountpoint is already renamed to /iscsi

   mount /iscsi2
   mount: can't find /iscsi2 in /etc/fstab
   

2. Mount /iscsi2 based on device path, successful.

   mount /dev/sdd1 /iscsi2
   

3. Shows that it is mounted:

   lsblk -af | grep -i iscsi
   L¦sdd1 ext4   ISCSI_Backup2    3829ed05-f445-425d-8213-3b1c2d41fba /iscsi2
   

4. Unmount /iscsi2:

   umount /iscsi2
   

5. Shows that it is unmounted:

   lsblk -af | grep -i iscsi
   L¦sdd1 ext4   ISCSI_Backup2    3829ed05-f445-425d-8213-3b1c2d41fba
   

6. Mount /iscsi based on device path. Failed.

   mount /dev/sdd1 /iscsi
   

7. Shows that it is still unmounted:

   lsblk -af | grep -i iscsi
   L¦sdd1 ext4   ISCSI_Backup2    3829ed05-f445-425d-8213-3b1c2d41fba
   

Any idea why mount is successful to /iscsi2 and fails to /iscsi ?