I have had to deal with hermie a time or two sometimes nature finds a way ,,Not a big deal,,I use hemostats and check the plant carefully for male bananas you will find them on new nodes or even up in the bud,,do not despair pull them off and ,,keep and eye on your other plants as well when you find a seed use the hemo's pull them off,,I have had to do this a time or two ,The plant is single minded when it wants to do something,,it wants to veg ,or flower,,once in flower they want to make big buds or lots of seeds,,If you have plants get pollinated do not chop your plants down you have done far to much work see them threw till the end,,If you keep the green seeds picked and keep them bananas off,,You will continue to get bigger buds,,pulling the seeds will give the plant no choice but to put it's growth into the buds ,,I have a Sour Diesel in my room right now that went hermie have had to pull maybe 20 seeds I caught it early and have tried to stay on top only found a few seeds on bottom of hermie plant and 2 others in my room second picture is my hermie ,it has not slowed me any never does,,Just take your time and remove anything you are suspect of,,be my advice but every man has to do what suits him,,wait for those trics to be right