UIPickerView Definition Conflicts With Previous Value Swift

I keep getting the error "Definition Conflicts With Previous Value" this error has only shown up the most recent time I opened XCode previously my code was working correctly and running allowing me to the the UITextField with the pickerView input view.

import UIKit

class FormViewController: UIViewController, UITextFieldDelegate, UIPickerViewDataSource, UIPickerViewDelegate  {

    @IBOutlet weak var timeTakenField: UITextField!
    let pickerView = UIPickerView()
    var options = ["1","2","3","4","5"]

 override func viewDidLoad() {
    super.viewDidLoad()
    pickerView.delegate = self
    timeTakenField.inputView = pickerView

}



// MARK: UIPickerView
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
    return 1
}

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    return options.count
}

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return options[row]
}

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        timeTakenField.text = options[row]
}

This is all the code relating to my picker view and the error is showing on the final two pickerView functions. I have checked all the code and it all seems correct to me I just cant seem to find the source of this error.

Any help will be greatly appreciated thanks.