Help with modifying spice of life carrot edition config

Hi, sorry if this has been asked and answered but I wasn't finding anything searching (new to the sub).

I'm playing ATM 9 on a local server and we wanted to increase the number of max hearts you could get with SOL carrot. I found the config file on the server side after hunting a bit and changed the milestones to include more milestones and restarted the server, but that didn't work. I got to the next milestone I set within the game and didn't get another heart. Does this have to be set before world gen or something, or is there something else I have to do to make the updated config stick?

Thanks