login crash bug

src/engine/objects/PlayerCharacter.java

@@ -4801,11 +4801,18 @@ public class PlayerCharacter extends AbstractCharacter {
                 //}
                 if(this.isEnteredWorld() && this.isActive() && this.getLevel() < 10){
                     this.setLevel((short) 10);
-                    MobLoot conc = new MobLoot(this,ItemBase.getItemBase(980066),false);
-                    this.getCharItemManager().addItemToInventory(conc);
-                    this.getCharItemManager().addItemToInventory(conc.promoteToItem(this),1);
+                    boolean hasConc = false;
+                    for(Item i : this.getCharItemManager().getInventory()){
+                        if(i.getItemBaseID() == 980066){
+                            hasConc = true;
+                        }
+                    }
+                    if(hasConc == false) {
+                        MobLoot conc = new MobLoot(this, ItemBase.getItemBase(980066), false);
+                        this.getCharItemManager().addItemToInventory(conc.promoteToItem(this), 1);
                         this.getCharItemManager().updateInventory();
                     }
+                }
                 
             } catch (Exception e) {
                 Logger.error(e);