diff --git a/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/SimulatorStorage.java b/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/SimulatorStorage.java
index 873af36e..8e0a7847 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/SimulatorStorage.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/SimulatorStorage.java
@@ -101,7 +101,7 @@ public class SimulatorStorage implements Enable, Disable {
     public static void delete(String name) {
         TNTSimulator tntSimulator = tntSimulators.remove(name);
         if (tntSimulator != null) {
-            tntSimulator.getPlayerShowMode().forEach((player, simulatorEntityShowMode) -> {
+            new HashMap<>(tntSimulator.getPlayerShowMode()).forEach((player, simulatorEntityShowMode) -> {
                 SimulatorCursor.hide(player, tntSimulator);
             });
             tntSimulator.hide();