Can't change the "Guest OS" property

Hi,

I'm trying to change the "Guest OS" property of a Linux virtual machine on vCenter Web Client.

The virtual machine shows on vCenter as "Other (32-bit)" Guest OS.

When I try to change on the "Edit Settings" option, it just creates a task that does nothing and the guest OS remains Other 32-bit, no matter what I choose as an OS.

Does anybody knows why this happens?