Adding UIViews through code, it overlaps with other items of the Main.storyboard

Hello,

I'm trying to add UIViews through code, but when I test the app, it overlaps with other objects of the Main.storyboard.

For example, it overlaps with the side bar and with the Segmented Control (I can't use it since I've added those views programmatically)

This is the code I've got so far:

import UIKit


class issuesScreen: UIViewController {
    @IBOutlet weak var csViewLeading: NSLayoutConstraint!
    var showingMenu=false
    lazy var scrollView: UIScrollView = {
        let view = UIScrollView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.contentSize.height = 2000
        return view
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(scrollView)
        setupScrollView()
    }
    //Here is when I'm adding the views
    func setupScrollView() {
        scrollView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
        scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
        scrollView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
        scrollView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
        let firstView = UIView()
        firstView.translatesAutoresizingMaskIntoConstraints = false
        firstView.backgroundColor = .black
    
        scrollView.addSubview(firstView)
        
        firstView.centerXAnchor.constraint(equalTo: scrollView.centerXAnchor).isActive = true
        firstView.topAnchor.constraint(equalTo: scrollView.topAnchor, constant: 40).isActive = true
        firstView.widthAnchor.constraint(equalToConstant: 400).isActive = true
        firstView.heightAnchor.constraint(equalToConstant: 180).isActive = true
        
        let secondView = UIView()
        secondView.translatesAutoresizingMaskIntoConstraints = false
        secondView.backgroundColor = .white
        scrollView.addSubview(secondView)
        
        secondView.centerXAnchor.constraint(equalTo: scrollView.centerXAnchor).isActive = true
        secondView.topAnchor.constraint(equalTo: scrollView.topAnchor, constant: 41).isActive = true
        secondView.widthAnchor.constraint(equalToConstant: 398).isActive = true
        secondView.heightAnchor.constraint(equalToConstant: 178).isActive = true
    }
    @IBAction func showBar(_ sender: UIBarButtonItem) {
        if(showingMenu) {
            csViewLeading.constant = -240
        } else {
            csViewLeading.constant = 0
            UIView.animate(withDuration: 0.3, animations: {self.view.layoutIfNeeded()})
        }
        showingMenu= !showingMenu
    }
}

That's how the side bar looks like now: https://i.imgur.com/n24HDvH.png

As you can see, it overlaps with the UIView and as I said, the segmented control doesn't work (I can't change to "TANCADES" or vice versa).

Any help will be appreciated. Thank you in advance!