Unchecked cast warning from compiler

I am trying to create a game. It is almost ready, but I get unchecked cast warning when I try to compile it. Here is the beginning of my code:

public class GUI extends JFrame implements ListSelectionListener {

    private Tiles tiles;
    private ConfigurationStore st;

    public GUI(ConfigurationStore cs) {
        super("My Game");
        st = cs;
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(1000,700);

        add(ConfigurationsPanel(), BorderLayout.WEST);
    }

This is my ConfigurationsPanel():

    private JPanel ConfigurationsPanel() {
        JPanel conf = new JPanel(new BorderLayout());
        addBorder(conf, "Configurations");
        ArrayList<Configuration> configurations = new ArrayList<>();
        configurations = store.getConfigurations();
        Configuration[] configurationsArray = new Configuration[configurations.size()];
        for(int i = 0; i < configurations.size(); i++) {
            configurationsArray[i] = configurations.get(i);
        }
        JList<Configuration> list = new JList<Configuration>(configurationsArray);
        list.addListSelectionListener(this);
        JScrollPane scrollPane = new JScrollPane(list);
        conf.add(scrollPane);
        return conf;
    }

And this is my valueChanged method:

    public void valueChanged(ListSelectionEvent e) {
        JList<Configuration> list = (JList<Configuration>) e.getSource();
        Configuration configuration = list.getSelectedValue();
        tiles = new Tiles(c);
    }

Compiler gives warning in the valueChanged method where I wrote JList<Configuration> list = (JList<Configuration>) e.getSource(); by saying: required: JList<Configuration> found: Object. Can you please tell me what part of my code is not right and how can I remove that warning. Thanks in advance.

Read and understand the warning.

Acknowledge that JVM cannot protect you from bad cast, and take responsibility for knowing what you're doing.

Then suppress the warning:

public void valueChanged(ListSelectionEvent e) {
    @SuppressWarnings("unchecked")
    JList<Configuration> list = (JList<Configuration>) e.getSource();
    ...