operator !* in update {}

Hi, according to unlang:

!* Delete all occurances of the named attribute, no matter what the value.

but when I want to use it like that: post-auth { Post-Auth-Type REJECT { update reply { Idle-Timeout !* 0 Session-Timeout !* 0 } } } but freeradius (2.1.7) does not seem to like it:

/etc/freeradius2//sites/ui.site.conf[205]: Parse error after "Idle-Timeout"

other operators work, e.g. ... update reply { Idle-Timeout -= 7200 Session-Timeout -= 86400 } ... but that's not handy... Regards, Jakob