[tor-relays] How to reset AccountingMax stats?

My relay has become convinced that it has reached its AccountingMax limit, though actually only 71% of it (according to my ISP) has been used.

How can I reset the stats so that this miscalculation is not used for future configuration of expected network traffic?

Yes, I know I can just erase /var/lib/tor, but that means starting from a new identity. I'm hoping that I can edit the state file to clear the stats. Advice?

Thanks.