Problem 10 Bank fail

CREATE PROCEDURE usp_GetHoldersWithBalanceHigherThan(@TargetBalance MONEY)
AS
BEGIN
    SELECT a.FirstName AS 'First Name', a.LastName AS 'Last Name' FROM AccountHolders AS a
    WHERE a.Id IN (
                    SELECT AccountHolderId FROM Accounts
                    GROUP BY AccountHolderId
                    HAVING SUM(Balance) > @TargetBalance
                  )
END