BauSystem_API/src/de/steamwar/bausystem/SWUtils.java

@@ -29,6 +29,14 @@ import java.util.List;
 public class SWUtils {
 
     public static void giveItemToPlayer(Player player, ItemStack itemStack) {
+        for (int i = 0; i < player.getInventory().getSize(); i++) {
+            ItemStack current = player.getInventory().getItem(i);
+            if (current != null && current.isSimilar(itemStack)) {
+                player.getInventory().setItem(i, null);
+                itemStack = current;
+                break;
+            }
+        }
         ItemStack current = player.getInventory().getItemInMainHand();
         player.getInventory().setItemInMainHand(itemStack);
         if (current.getType() != Material.AIR) {