When you close (forfeit) a Bankroll, any open picks tied to that Bankroll are forfeited along with it. Closing a Bankroll cannot be undone, and any progress or open positions in that Bankroll — including picks that haven't settled yet — are lost when you confirm the closure.
Any prizes that have already been transferred to your Prize Wallet are not affected — those remain available for withdrawal regardless of whether you close, pass, or fail a Bankroll.