BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/gui/SimulatorRedstoneGui.java

@@ -89,6 +89,7 @@ public class SimulatorRedstoneGui extends SimulatorScrollGui<RedstonePhase> {
             new SimulatorRedstoneSettingsGui(player, simulator, redstone, this).open();
         }));
 
+        //Group chooser
         inventory.setItem(49, new SWItem(Material.LEAD, "§eMove", clickType -> {
             new SimulatorGroupChooserGui(player, simulator, simulator.getElements(), redstone, simulatorGroup, this).open();
         }));

BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/gui/SimulatorTNTGui.java

@@ -46,6 +46,7 @@ public class SimulatorTNTGui extends SimulatorScrollGui<TNTPhase> {
     public SimulatorTNTGui(Player player, Simulator simulator, TNTElement tnt, SimulatorGroup parent, SimulatorBaseGui back) {
         super(player, simulator, 6 * 9, tnt.getPhases());
         this.tnt = tnt;
+        this.parent = parent;
         this.back = back;
     }