Hi Bud,
it would greatly help to know which program? to be able to give any kind of sound advice.
that said: you can do one of two things: in most cases they’ll allow you to lose the player over to them and then proceed from zero: which is an option but if its a big time player there’s a reason these places are so willing to allow that: which is in many cases the player will turn around the next couple of months and lose it all back and then a good chunk chasing that lost fortune – Or you can simply stop promoting the program.
with a carry-over balance the above are your two best bets IMHO.