diff --git a/src/main/java/cn/nukkit/network/RakNetInterface.java b/src/main/java/cn/nukkit/network/RakNetInterface.java
index 4dc2fba7a6..20dab26870 100644
--- a/src/main/java/cn/nukkit/network/RakNetInterface.java
+++ b/src/main/java/cn/nukkit/network/RakNetInterface.java
@@ -216,8 +216,7 @@ public void setName(String name) {
                         ProtocolInfo.CURRENT_PROTOCOL + ";" +
                         ProtocolInfo.MINECRAFT_VERSION_NETWORK + ";" +
                         info.getPlayerCount() + ";" +
-                        info.getMaxPlayerCount() + ";" +
-                        Server.getInstance().getServerUniqueId().toString());
+                        info.getMaxPlayerCount());
     }
 
     public void setPortCheck(boolean value) {
@@ -326,4 +325,4 @@ private DataPacket getPacket(byte[] buffer) {
 
         return data;
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/cn/nukkit/utils/ClientChainData.java b/src/main/java/cn/nukkit/utils/ClientChainData.java
index 6d1ce03ca8..21297693f5 100644
--- a/src/main/java/cn/nukkit/utils/ClientChainData.java
+++ b/src/main/java/cn/nukkit/utils/ClientChainData.java
@@ -21,7 +21,7 @@
  * Nukkit Project
  * ===============
  */
-public class ClientChainData {
+public final class ClientChainData {
 
     public static ClientChainData of(byte[] buffer) {
         return new ClientChainData(buffer);