Configure supervision timeout

Hi Bluez,

Recently, I have noticed supervision timeout is not enough to pair devices.

How can I configure supervision timeout? Is there any configuration file?

First, I have checked "main.conf" but I couldn't find any related properties.
I also found /sys/kernel/debug/bluetooth/hci0 has a bunch of system settings.
But I am not sure editing those files is a right approach.

Any help would be appreciated.

Thanks,
Seulki.