Two plants roots tangled but at different stages of budding. What do i do when it's time to flush?

I have two plants and one is within a week of being ready but the roots are so tangled I can't separate them to flush it. The other plant is a 2-3 weeks behind the first. What should I do? Hack the first plants roots so I can separate them and flush it or should I flush both for a few days then chop the first girl and then resume nutes for the other girl. Will that stunt the second plant?

You could skip the flush and cure them properly. Why didn't you put them in separate pots to start?