setBackgroundcolor error in the onitemclicklistener

I want items to change color when the user selects them. But when an item changes color, another item changes in the same way, I don't know why this error occurs, this is the code

override fun onItemClick(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
    var ds=listView1.adapter.getItemId(position)

I do not know if there is any other function that I do not know, it should be noted that I am starting in Android programming, if you could help me

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