how to update last imaged with ...."baseImageFile"

I have seen that into properties of a workstation (by consoleone) ,
there is ZenworksImaging - History.
there is a field named "baseImageFile" where is written the path and the
name of image.

I have created more time the image by "F5" of a pc ,but field isn't update.

Why? Why isn't it update ?
Is it dangerous?
How can I update the last imaged with ...."baseImageFile" correctly?


thanks
Monica