Version 7.2.3 does not have the --unmaptarget command

[Tomato Young]

Hello BeeGFS team:

When I try to unmap the target, It tells me there is no unmaptarget command in version 7.2.3. But there is --unmaptarget command in documentation. I'm wondering if there is something wrong with my installation or if V7.2.3 and later versions do remove this command?