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How to edit the data received from the intent.putExtra?

I am sending a list data from Activity "A" to Activity "B" using intent as follows.

private var items : Lists<Items> 

  context.startActivity(
                Intent(context, B::class.java).apply {
                    putExtra("itemList", items as ArrayList)
                }
            )

Inside Activity "B"

   val itemList = intent?.extras?.getSerializable("itemList") as? ArrayList<Tweet>

  // trying to edit the list
  items.forEachIndexed { index, t ->
            run {
                if (t.id == tweet.id) {
                    items[index].name = "hello"
                }
            }
        }

However, when I try to edit the list items, it is not editing the list. Is it because when I send the data using intent is it sending a copy of my original data? Any help would be appreciated.