How to deal with ambiguity in "where" clause

In my queue tree configuration some names have form of
“LAN” “LAN->Central” “LAN->pppoe-Ukrtel”

When i type:

/queue tree print where parent=LAN

system returns an error

ambiguous value of parent, more than one possible value matches input

So i can’t get properties of records where parent is “LAN” exactly.
How to tell to system do not resolve ambiguity?

Try a regexp match:

/queue tree print where parent~"^LAN\$"

Note that the equal sign (=) has changed to a tilde (~).

I know about a regexp.
But situation with “=” is a real “bug” (unfortunately, not only one in the RoS).