Handle the list of dynamic checkboxes when the widget is added on button click in flutter

When clicking the add button, the same widget is replicated. The widget contains the list of checkboxes that are multi selectable. I am able to replicate the widget but I got problem to handle the checkboxes according to the index of the widget. In image below the checkbox checked state is replicated along with the new add widget.

I have implemented as follows:

Build the widget according to the addbutton click

  ListView.builder(
                  itemCount: counting,
                  shrinkWrap: true,
                  physics: const NeverScrollableScrollPhysics(),
                  itemBuilder: (_, index) {
                    return _buildLayout(context, index);
                  });



                 //counting is number of **blueplus** icon is clicked
     Widget  _buildLayout(BuildContext context, int i) {       
      return Column(
      children: <Widget>[
        Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: <Widget>[
            Text(
              addContainer,
              style: TextStyle(color: Colors.blueGrey),
            ),
            Container(
              width: 64.0,
              alignment: Alignment.center,
              child: IconButton(
                  onPressed: () => {i == 0 ? addRow(i) : deleteRow(i)},
                  icon: Icon(
                    i == 0
                        ? Icons.add_circle_outline
                        : Icons.remove_circle_outline,
                    color: i == 0 ? Theme.of(context).primaryColor : Colors.red,
                  )),
            ),
          ],
        ),        
        _buildCheckBoxes()
      ],
    );
  }



Widget _buildCheckBoxes() {
    return
        Container(         
            width: MediaQuery.of(context).size.width,
            child: Column(
                mainAxisAlignment: MainAxisAlignment.start,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  InkWell(
                      onTap: () {
                        showHide();
                      },
                      child: Row(
                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
                          children: <Widget>[
                            Text(
                              productionmareketway,
                              style: TextStyle(
                                  fontSize: 18, fontWeight: FontWeight.bold),
                            ),
                            showHidee
                                ? Icon(Icons.keyboard_arrow_up)
                                : Icon(Icons.keyboard_arrow_down)
                          ])),
                  SizedBox(
                    width: 20,
                  ),
                  showHidee
                      ? ListView.builder(
                          shrinkWrap: true,
                          physics: const NeverScrollableScrollPhysics(),
                          itemCount: widget.responseMarket.length,
                          itemBuilder: (ctx, i) {
                            return _buildSingleCheckBox(
                                context,
                                widget.responseMarket[i].name,
                                widget.responseMarket[i].isChecked,
                                widget.responseMarket[i].id,
                                widget.responseMarket[i].identifier,
                                i);
                          })
                      : Container()
                ])
           );
          } 
  



Widget _buildSingleCheckBox(BuildContext context, String name, bool isChecked,
      int i, String identifier, int j) {
    return Container(
      child: new CheckboxListTile(
        title: new Text(name),
        value: isChecked,
        activeColor: Theme.of(context).primaryColor,
        checkColor: Colors.white,
        onChanged: (bool value) {
          setState(() {
            widget.responseMarket[i].isChecked = value;
            print(value);
            print(i);

            widget._onChecked(
                value,
                widget.responseMarket[i].id,
                widget.responseMarket[i].name,
                widget.responseMarket[i].identifier,
                counting);
          });
        
        },
      ),
    );
  }

Add and delete widget function

addRow(int i) {
setState(() {
  counting = counting + 1;
});
} 

 deleteRow(int i) {
    setState(() {
      counting = counting - 1;
    });
  }

My callback function

 onMarketChecked(var value, int i, String name, String identifier, int j) {
setState(() {
  if (responseMarket[i].isChecked == true) {
    nonMarketRepated.add(name);
  } else {
    nonMarketRepated.remove(responseMarket[i].name);
  }
});
}