This happened at a Pony Bronco 12U game .. line drive to right field. Home plate umpire signaled it fair. First base coach and everyone else thought it was foul. First base coach sent the runner back to bat again after he touched 1st base. Our coaches saw this and told him to get back on first. Defense threw the ball to first and didn't tag the batter and just tagged the base. Runner got back to first just after they stepped on 1st. Is it still a force out even though he previously touched the base or does he need to be tagged for an out?