Play Framework 2.3.x mapping a checkbox to a boolean field

Using Java Play Framework 2.3.7, I have a custom view template for a form with a text field and a select dropdown. This is how I was able to get my custom view to work. Now, I need to add a checkbox to this view template. I am having trouble getting the checkbox to map properly to a boolean attribute. I've looked at this question but it seems to be for an older version of Play, so it isn't helpful to me.

I have a class CSVData which contains a list of type CSVField. Here are the attributes for these classes:

public class CSVData{

private String name;
private String description;
private String dataFilePath;
private List<CSVField> fields;
private Double latitude;
private Double longitude;


// rest of class... }

and

public class CSVField {
    private String name;
    private String type;
    private boolean unique;

...}

In my controller I have this

Form<CSVData> formData = Form.form(CSVData.class).bindFromRequest();

In my view template I have this (most bootstrap styling removed for brevity):

@helper.repeat(csvForm("fields"), min=1) { csvField =>
    @fieldGroup(csvField, optionMap = myTypes)
}

Where @fieldGroup is the following:

@fieldGroup(csvField: Field, optionMap: List[String]) = {
<div class="multi-field">
    <input type="text"
        class="form-control"
        name="@csvField("name").name"
        value="@csvField("name").value.getOrElse("")"/>

    <select
        class="form-control"
        id="select-type"
        name="@csvField("type").name"
        >
        <option class="blank" value="">Select type</option>
        @for((optionName) <- optionMap) {
            <option id="@optionName" value="@optionName" @if(csvField("type").value.equals(Some(optionName))) {selected} >
                    @optionName
            </option>
        }
    </select>

    <div class="checkbox">
        <label>
            <input type="checkbox"
            name="@csvField("unique").name"
            value=@csvField("unique").value.getOrElse(true)> Unique
        </label>
    </div>
    <button type="button" class="btn btn-danger">Delete</button>
</div>
}

This ends up looking like

However, when I fill in my form and submit it, I get a Persistence Exception. I think the issue is with the value=@csvField("unique").value.getOrElse(true) portion of the checkbox. How can I set up the checkbox value properly so it maps to my boolean attribute?

PS - Here is the stacktrace of the exception that I am seeing