Warning: Failed prop type: Invalid prop `uncheckedImage` of type `string` supplied to `CheckBox`, expected `number`

I'm not even trying to set this prop. Why am I getting this error?

This is my code

```
<CheckBox
        onChange={this.onClick}
        checked={this.state.isChecked}
        label={this.props.label || ''}
        labelStyle={this.props.labelStyle}
        checkboxStyle={this.props.checkboxStyle}
 />
```