diff --git a/src/main/java/uulm/teamname/marvelous/gamelibrary/json/ingame/MessageStructure.java b/src/main/java/uulm/teamname/marvelous/gamelibrary/json/ingame/MessageStructure.java
index e742668..7ced3b1 100644
--- a/src/main/java/uulm/teamname/marvelous/gamelibrary/json/ingame/MessageStructure.java
+++ b/src/main/java/uulm/teamname/marvelous/gamelibrary/json/ingame/MessageStructure.java
@@ -16,9 +16,6 @@ public class MessageStructure {
     /** The list of {@link Event}s sent inside the message. */
     public Event[] messages;
 
-    /** The checksum of the current game state at the time the message was sent. This is legacy (or optional). */
-    public int checksum;
-
     /** The type of the custom content sent with the message. */
     public String customContentType;
 
@@ -30,12 +27,12 @@ public class MessageStructure {
         if (this == o) return true;
         if (o == null || getClass() != o.getClass()) return false;
         MessageStructure that = (MessageStructure) o;
-        return checksum == that.checksum && messageType == that.messageType && Arrays.equals(messages, that.messages) && Objects.equals(customContentType, that.customContentType) && Objects.equals(customContent, that.customContent);
+        return messageType == that.messageType && Arrays.equals(messages, that.messages) && Objects.equals(customContentType, that.customContentType) && Objects.equals(customContent, that.customContent);
     }
 
     @Override
     public int hashCode() {
-        int result = Objects.hash(messageType, checksum, customContentType, customContent);
+        int result = Objects.hash(messageType, customContentType, customContent);
         result = 31 * result + Arrays.hashCode(messages);
         return result;
     }
@@ -45,7 +42,6 @@ public class MessageStructure {
         return "MessageStructure{" +
                 "messageType=" + messageType +
                 ", messages=" + Arrays.toString(messages) +
-                ", checksum=" + checksum +
                 ", customContentType='" + customContentType + '\'' +
                 ", customContent=" + customContent +
                 '}';