diff --git a/Documentation/Interactions_serveur-clients.ods b/Documentation/Interactions_serveur-clients.ods
index 3757740b..b9561dc4 100644
Binary files a/Documentation/Interactions_serveur-clients.ods and b/Documentation/Interactions_serveur-clients.ods differ
diff --git a/Workspace/core/src/main/java/com/pqt/core/entities/messages/MessageType.java b/Workspace/core/src/main/java/com/pqt/core/entities/messages/MessageType.java
index 1c2a3170..0455c219 100644
--- a/Workspace/core/src/main/java/com/pqt/core/entities/messages/MessageType.java
+++ b/Workspace/core/src/main/java/com/pqt/core/entities/messages/MessageType.java
@@ -1,38 +1,27 @@
 package com.pqt.core.entities.messages;
 
 public enum MessageType {
+    ERROR_QUERY,
+    REFUSED_QUERY,
+
     QUERY_CONNECT,
     ACK_CONNECT,
-    ERR_CONNECT,
-    REF_CONNECT,
 
     QUERY_SALE,
     ACK_SALE,
-    ERR_SALE,
-    REF_SALE,
 
     QUERY_REVERT_SALE,
     ACK_REVERT_SALE,
-    ERR_REVERT_SALE,
-    REF_REVERT_SALE,
 
     QUERY_STAT,
     MSG_STAT,
-    ERR_STAT,
-    REF_STAT,
 
     QUERY_STOCK,
     MSG_STOCK,
-    ERR_STOCK,
-    REF_STOCK,
 
     QUERY_LOGIN,
     ACK_LOGIN,
-    ERR_LOGIN,
-    REF_LOGIN,
 
     QUERY_UPDATE,
-    ACK_UPDATE,
-    ERR_UPDATE,
-    REF_UPDATE
+    ACK_UPDATE
 }