hermi! u stressed it at all? if its not a stress hermi your fucked imo, you could try picking them as they appear but it seems futile with that little bud to save because they wont stop.
if its been caused by stress i'd give picking a go, i had a timer issue and my light shedule went to pot, once i solved the issue my biggest plant popped a few horns, i just pulled em off, kept the grow room stable and the plant stopped growing horns, no seeds so i was quite lucky.