diff --git a/src/main/java/net/pietru/cookie_utils/permissions/Permissions.java b/src/main/java/net/pietru/cookie_utils/permissions/Permissions.java
index e826e8b..79422b9 100644
--- a/src/main/java/net/pietru/cookie_utils/permissions/Permissions.java
+++ b/src/main/java/net/pietru/cookie_utils/permissions/Permissions.java
@@ -115,6 +115,8 @@ public class Permissions {
     }
 
     public static void set_group(String playerId,String group){
+        if (!groupPermsMap.containsKey(group))
+            return;
         player_group.put(playerId,group);
         reload_player_groups(false);
     }