Message Seen or Not in android Firebase

I want to show if a message is seen or not in my app which is using Firebase Realtime Database. What I am able to do till now is update it on the database if the message is seen or not but while running the code the app crashes.The line of code which is producing error is if (message.getTo().equals(messageSenderID) && message.getFrom().equals(messageReceiverID)).

This is the error coming while running

com.google.firebase.database.DatabaseException: Can't convert object of type java.lang.String to type com.shakshi.Model.Message
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertBean(CustomClassMapper.java:436)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass(CustomClassMapper.java:232)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass(CustomClassMapper.java:80)
    at com.google.firebase.database.DataSnapshot.getValue(DataSnapshot.java:203)
    at com.shakshi.Activity.ChatActivity$6.onChildAdded(ChatActivity.java:291)
    at com.google.firebase.database.core.ChildEventRegistration.fireEvent(ChildEventRegistration.java:79)
    at com.google.firebase.database.core.view.DataEvent.fire(DataEvent.java:63)
    at com.google.firebase.database.core.view.EventRaiser$1.run(EventRaiser.java:55)
    at android.os.Handler.handleCallback(Handler.java:938)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:246)
    at android.app.ActivityThread.main(ActivityThread.java:8512)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)

Isseen Listener

private void seenMessage() {

    RootRef.child("Messages").child(messageSenderID).child(messageReceiverID);

    seenlistener = RootRef.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {

            for (DataSnapshot ds: snapshot.getChildren()) {

                Message message = ds.getValue(Message.class);

                if (message.getTo().equals(messageSenderID) && message.getFrom().equals(messageReceiverID)) {

                    HashMap<String, Object> hashMap = new HashMap<>();
                    hashMap.put("isseen", true);
                    ds.getRef().updateChildren(hashMap);

                }

            }

        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {

        }
    });
    RootRef.addListenerForSingleValueEvent(seenlistener);

}

My Code for checking if the message is seen or not

if (position == userMessages.size() -1) {

        if (messages.getSeen()) {

            messageViewHolder.seen.setText("seen");


        } else {
            messageViewHolder.seen.setText("Delivered");
        }

    } else {
        messageViewHolder.seen.setVisibility(View.GONE);
    }

JSON file of a Database:

"Messages" : {
"OiZrWinSoGf1zjEGOsfi4QK5BOJ3" : {
  "duYQ1hm0WLYssMFacdqgsEBwS9N2" : {
    "-MhB2t4tYdyWYdgw-Lpc" : {
      "date" : "Aug 16, 2021",
      "from" : "OiZrWinSoGf1zjEGOsfi4QK5BOJ3",
      "message" : "hello",
      "messageID" : "-MhB2t4tYdyWYdgw-Lpc",
      "time" : "04:34 am",
      "to" : "duYQ1hm0WLYssMFacdqgsEBwS9N2",
      "type" : "text"
    },
    "-MhB2vrGb8kBuqklJN27" : {
      "date" : "Aug 16, 2021",
      "from" : "duYQ1hm0WLYssMFacdqgsEBwS9N2",
      "message" : "hyy\n",
      "messageID" : "-MhB2vrGb8kBuqklJN27",
      "time" : "04:34 AM",
      "to" : "OiZrWinSoGf1zjEGOsfi4QK5BOJ3",
      "type" : "text"
    },
    "-MhB30bIMAbUv_eFEdAV" : {
      "date" : "Aug 16, 2021",
      "from" : "OiZrWinSoGf1zjEGOsfi4QK5BOJ3",
      "message" : "https://firebasestorage.googleapis.com/v0/b/lets-chat-d452c.appspot.com/o/Image%20File%2F-MhB30bIMAbUv_eFEdAV.jpg?alt=media&token=8e2fd6ed-3924-453e-91f2-865163c76479",
      "messageID" : "-MhB30bIMAbUv_eFEdAV",
      "name" : "primary:DCIM/Camera/20210618_013510.jpg",
      "time" : "04:34 am",
      "to" : "duYQ1hm0WLYssMFacdqgsEBwS9N2",
      "type" : "images"
    },

} }

Model Message Class

public class Message {

private String from, message, type, to, messageID, time, date, name;
private Boolean isSeen;

public Message()
{

}

public Message(String from, String message, String type, String to, String messageID, String time, String date, String name,Boolean isSeen) {
    this.from = from;
    this.message = message;
    this.type = type;
    this.to = to;
    this.messageID = messageID;
    this.time = time;
    this.date = date;
    this.name = name;
    this.isSeen = isSeen;
}

public String getFrom() {
    return from;
}

public void setFrom(String from) {
    this.from = from;
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}

public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}

public Boolean getSeen() {
    return isSeen;
}

public void setSeen(Boolean seen) {
    this.isSeen = seen;
}

public String getTo() {
    return to;
}

public void setTo(String to) {
    this.to = to;
}

public String getMessageID() {
    return messageID;
}

public void setMessageID(String messageID) {
    this.messageID = messageID;
}

public String getTime() {
    return time;
}

public void setTime(String time) {
    this.time = time;
}

public String getDate() {
    return date;
}

public void setDate(String date) {
    this.date = date;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

}