How to revoke old delegation?

After updating to Hiro wallet [desktop with Ledger] and sending out 50% of my holdings, I went to delegate the remaining STX to Xverse Pool. There, I ran into a problem. Even though I had just sent out 50% of my STX with the Hiro desktop wallet, the Xverse website shows the previous full balance as being “locked” in my wallet. Also, it gives a warning: “You’re already stacking in another pool. . . . you need to revoke the current delegation with the pool you’re using.” I have nothing besides the Delegated To Address: SP3TDKYYRTYFE32N19484838WEJ25GX40Z24GECPZ How am I supposed to revoke the current delegation?