Configure nochallenge coova-chilli

I use coova 1.4 on openwrt 19.07.8.

I try to disable challenge so I add the option nochallenge 1 to file /etc/config/chilli.

I start coova with cmd: /etc/init.d/chilli start and always get an error.

Tue Aug 24 22:46:40 2021 daemon.debug chilli[3847]: (Re)processing options [/var/run/chilli.3847.cfg.bin]
Tue Aug 24 22:46:40 2021 daemon.err chilli[3847]: chilli[3847]: (Re)processing options [/var/run/chilli.3847.cfg.bin]
Tue Aug 24 22:46:40 2021 daemon.debug chilli[3849]: running chilli_opt on /var/run/chilli.3847.cfg.bin
Tue Aug 24 22:46:40 2021 daemon.err chilli[3847]: chilli[3849]: running chilli_opt on /var/run/chilli.3847.cfg.bin
Tue Aug 24 22:46:40 2021 daemon.err chilli[3847]: coova-chilli: option does not take an argument: nochallenge
Tue Aug 24 22:46:40 2021 daemon.warn chilli[3847]: could not generate configuration (/var/run/chilli.3847.cfg.bin), sleeping one second
Tue Aug 24 22:46:40 2021 daemon.err chilli[3847]: chilli[3847]: could not generate configuration (/var/run/chilli.3847.cfg.bin), sleeping one second

How can i configure nochallenge in openwrt.

Thank you.