How to delete a map from list in an Item of a table in DynamoDB using nodeJS?

Question

I am developing an app and I am using AWS DynamoDB as the database server. DB is connected with nodeJS. I have a table called chat to store messages. In chat table every item have connectionid as partition key. An item looks like this

{"id": "123456", "messages": [{"id": "1214545","message":"ksadfksfmsfsdf","sender":"112415", "timestamp": "27:1:2022:11:53"}]}

This is a single Item and there are more inside the chat table.

I have been trying to delete a message inside the item. Its easy for me to delete a whole item because connectionid is the partition key. But I want to delete it with respect to id which is nested. How to achieve this?