If a referee fails to sign that a kick is indirect and the ball enters the opponent's goal, what must happen?

When a free kick is awarded in soccer, it can either be direct or indirect. An indirect kick must have the ball touched by another player before a goal can be scored. If the referee fails to indicate that the kick is indirect, but the ball enters the opponent's goal, the goal cannot be counted because the nature of the kick wasn't properly communicated. Since the kick was an indirect one, it must be retaken if the conditions required for it to become valid (meaning it must be touched by another player first) are not met. This ensures that the integrity of the rules is maintained, as all players need to be aware of the situation. Therefore, retaking the kick is the correct procedure in this scenario.