Solved PlayerPickUpItemEvent

I am trying to make it so that only the player who throw the snowball can pick the item that drops when it hits up.

Code:java

}
@EventHandler
public void onSnowballHit(ProjectileHitEvent event) {
Projectile entity = (Projectile) event.getEntity();
if (entity instanceof Snowball) {
String uniqueId = event.getEntity().getUniqueId().toString();
if (damageMap.containsKey(uniqueId));{
 
Projectile projectile = (Projectile) event.getEntity();
@SuppressWarnings("deprecation")
Player player = (Player) projectile.getShooter();
String shooter = (String) player.toString();
Location loc = event.getEntity().getLocation();
 
if (weaponMap.get(uniqueId).equals("IRON_AXE")) {
ItemStack is = new ItemStack(Material.IRON_AXE);
Item item = (Item) loc.getWorld().dropItem(loc, is);
String unique = (String) item.getUniqueId().toString();
item.setPickupDelay(100);
damageMap.remove(uniqueId);
weaponMap.remove(uniqueId);
playerMap.put(unique, shooter);
}
 
}
}
}
@EventHandler
public void onPickup(PlayerPickupItemEvent event) {
String pickedItem = event.getItem().getUniqueId().toString();
if (playerMap.containsKey(pickedItem)) {
String uniqueId = (String) playerMap.get(pickedItem);
String player = event.getPlayer().getName().toString();
if (!uniqueId.equals(player)) {
event.setCancelled(true);
playerMap.remove(uniqueId);
}
}
}
}

It wont let anyone pick up the item. If I change it to

Code:java

 
event.setCancelled(true);
if (uniqueId.equals(player)) {
event.setCancelled(false);

, everyone can pick up the item. I believe that the problem has to do with playerMap, which I defined like this:

Code:java

HashMap<String, String> playerMap = new HashMap<String, String>();

However, I cannot identify what's wrong with my code.