Shaping problem with pfSense 1.2.3

[dan34]

I have started seeing this error in the logs and traffic shaping doesn't start.

php: : There were error(s) loading the rules: pfctl: real-time sc exceeds 80%
of the interface bandwidth (300Kb) /tmp/rules.debug:42: errors in queue
definition pfctl: Syntax error in config file: pf rules not loaded - The line
in question reads [ real-time sc exceeds 80% of the interface bandwidth (300Kb)
/tmp/rules.debug]:

I used the wizard to set up shaping so apparently it's generating an incorrect rule. Is there a way to fix this? If not, how do I wipe the shaping configuration out and start over?

I'm running 1.2.3 nano.