Reversed polarity on one of my controllers when setting up

Today was swapping my 75100 controllers over to another scoooter upon connecting them I accidentally reversed polarity on one one then for a sec then noticed now when I try set them up that polarity keep flashing red and blue as if it's having overcurrent issues and when I set up trust my settings up to 85 V to handle fully charged 72 V. It's after I write it revert back to 72 V and I can't get it to stay 84 and help.