How can I get docker-machine to start counting IPs from 192.168.99.100 again?

Previously, when I first started a VM with docker-machine, the IP 192.168.99.100 was assigned. Any machine I started after that gets 192.168.99.101, 192.168.99.102, etc.

At some point, the first machine started getting 192.168.99.103 and no matter what I do (stopping all machines, re-creating machines, etc), the IP for the first machine I bring up always ends with 103. Is there anything that can be done to have the machine start over at 192.168.99.100?

Source: StackOverflow