diff --git a/core/src/main/java/de/erethon/dungeonsxl/global/GroupSign.java b/core/src/main/java/de/erethon/dungeonsxl/global/GroupSign.java
index 262f8349..d585714e 100644
--- a/core/src/main/java/de/erethon/dungeonsxl/global/GroupSign.java
+++ b/core/src/main/java/de/erethon/dungeonsxl/global/GroupSign.java
@@ -136,11 +136,12 @@ public class GroupSign extends JoinSign {
         DGroup playerGroup = (DGroup) plugin.getPlayerGroup(player);
         if (playerGroup != null) {
             if (playerGroup.getLeader().equals(player)) {
-                if (group != null || maxElements < playerGroup.getMembers().size()) {
+                if (playerGroup.getGroupSign() != null || group != null || maxElements < playerGroup.getMembers().size()) {
                     MessageUtil.sendMessage(player, DMessage.ERROR_LEAVE_GROUP.getMessage());
                     return;
                 } else {
                     group = playerGroup;
+                    group.setGroupSign(this);
                     group.setDungeon(dungeon);
                     update();
                     return;
@@ -165,8 +166,10 @@ public class GroupSign extends JoinSign {
 
             if (groupName != null) {
                 group = new DGroup(plugin, groupName, player, dungeon);
+                group.setGroupSign(this);
             } else {
                 group = new DGroup(plugin, player, dungeon);
+                group.setGroupSign(this);
             }
             update();
 
diff --git a/core/src/main/java/de/erethon/dungeonsxl/player/DGroup.java b/core/src/main/java/de/erethon/dungeonsxl/player/DGroup.java
index b781fc23..16a691d1 100644
--- a/core/src/main/java/de/erethon/dungeonsxl/player/DGroup.java
+++ b/core/src/main/java/de/erethon/dungeonsxl/player/DGroup.java
@@ -43,6 +43,7 @@ import de.erethon.dungeonsxl.config.DMessage;
 import de.erethon.dungeonsxl.dungeon.DDungeon;
 import de.erethon.dungeonsxl.dungeon.DGame;
 import de.erethon.dungeonsxl.dungeon.DungeonConfig;
+import de.erethon.dungeonsxl.global.GroupSign;
 import de.erethon.dungeonsxl.world.DGameWorld;
 import de.erethon.dungeonsxl.world.DResourceWorld;
 import java.util.ArrayList;
@@ -69,6 +70,7 @@ public class DGroup implements PlayerGroup {
 
     private int id;
     private String name;
+    private GroupSign groupSign;
     private Player captain;
     private PlayerCollection players = new PlayerCollection();
     private PlayerCollection invitedPlayers = new PlayerCollection();
@@ -177,6 +179,14 @@ public class DGroup implements PlayerGroup {
         this.name = name;
     }
 
+    public GroupSign getGroupSign() {
+        return groupSign;
+    }
+
+    public void setGroupSign(GroupSign groupSign) {
+        this.groupSign = groupSign;
+    }
+
     @Override
     public Player getLeader() {
         return captain;