You should just be able to put it into New to update the value, then back to the original status. The reason that this is 'the way' is that at Tumblr, if you relocate a machine, the RACK_POSITION does but so does all the power telemetry, which requires having the asset go through the web based intake process again. The web based intake is only available when an asset is in New status.
I'd be open to a patch to allow for more flexibility, but the default is the 'right' things for the Tumblr environment.