try this console cheat:
active testingcheats true
Then type in
traits.remove_trait exacttraitname (polyamorous or whatever the exact trait name is)
I haven’t tried this cheat in ages but it used to work to remove reward store traits. CAUTION: I’ve never tried it with a custom trait. You might want to back up your save before trying it just to be safe.
Original URL: https://www.loverslab.com/topic/66213-wickedwhims-435139d-13-january-2019/?do=findComment&comment=2496163