Fix PersonalKitCreator

Signed-off-by: Lixfel <agga-games@gmx.de>

FightSystem_Core/src/de/steamwar/fightsystem/commands/GUI.java

@@ -139,7 +139,7 @@ public class GUI {
                 anvilInv.setItem(Material.LEATHER_CHESTPLATE);
                 anvilInv.setCallback(s -> {
                     SteamwarUser user = SteamwarUser.get(p.getUniqueId());
-                    if(PersonalKit.get(user.getId(), Config.SchematicType.toDB(), s).isInUse()) {
+                    if(PersonalKit.get(user.getId(), Config.SchematicType.toDB(), s) != null) {
                         msg.sendPrefixless("KITNAME_IN_USE", p, ChatMessageType.ACTION_BAR);
                         p.closeInventory();
                         return;