[LARTC] How to change HTB default value?

["openings" <openings@xxxxxxxxxxxxxxxxx>]

Hi.

I want to change HTB qdisc's default setting to 20.

but, i cannot change it.

# tc qdisc change dev eth0 root handle 1: htb default 20
RTNETLINK answers: Invalid argument

I can add qdisc and del qdisc. but can't change qdisc setting.

For class, I can add, del, change all setting.

How to change HTB qdisc's default value?