Facing issue with storing and retrieving.

[SupreetRonad]

Hey guys, So I have recently tried to use localstore to store chats locally for chatbot. The issue I'm facing is that the insertion of data is incorrect, that is, it's not behaving as expected. This is my code. For storing data,

And this for displaying it on screen,

And this is what is displayed,

The value gets overwritten every time I press the button, while it should have appended the new values. The debug output of the collection, (Each line is printed when I press the button.)

Would be great if someone could help me out in this. Thank you.