The configuration object is not unique: There already exist

Hi, I tried to add a second HDD to OpenMediaVault - I formatted the drive and then when I try to mount it I get this error The configuration object is not unique: There already exist a mount point for /dev/sdb. I have unmounted it and now I can not see it in Filesystems though it shows in Physical Disks.

Any help would be appreciated as Linux is new to me and I do not really have confidence with the command line stuff.

It finished the format, it was the long format went up to 100% and said done in web interface. The version is 0.3.0.17 (omnius)