Let me copy a bit more to explain the question...
Once per day as a swift action, you get a bonus on attack rolls or AC until your next action. At the beginning of your next action, you can reallocate the bonus if desired. This lasts for 1 minute.
How do you interpret that? Are they substituting "next action" for "next round"?
Wait, maybe they mean something like this:
-- End of turn, activate feat for AC bonus
-- Beginning of next turn, reallocate it to attack bonus, take action (to attack)
-- Bonus is now gone
Or do you keep the bonus for the full minute?