title: Unable to activate constraint with anchors error with UIimageView
body: <p>Posting a question for the first time here.</p>
  <p>So I have been trying to make an animation of an UIimageView. I did that so far. So the image moves from the middle of the screen to the top. I want to be able to make that animation with constraints. But while trying to add some constraints, I receive this error &quot;Unable to activate constraint with anchors error&quot;.</p>
  <p>here is the code which I try to add some constraints to banditLogo imageview.</p>
  <pre><code>        override func viewDidLoad() {
      super.viewDidLoad()
      
      
      
      view.addSubview(banditLogo)
      
      view.translatesAutoresizingMaskIntoConstraints = false // autolayout activation
      
      chooseLabel.alpha = 0
      signInButtonOutlet.alpha = 0
      
      self.banditLogo.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 304).isActive = true
      self.banditLogo.leftAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leftAnchor, constant: 94).isActive = true
      self.banditLogo.widthAnchor.constraint(equalToConstant: 224).isActive = true
      self.banditLogo.heightAnchor.constraint(equalToConstant: 289).isActive = true
  
    }
  </code></pre>
  <p>and here is the func that makes the animation.</p>
  <p>this func is being called in viewDidAppear and animatedImage variable of the function is referred to banditLogo UIimageView.
  so when the view screen loads up, the image moves to top of the view.</p>
  <pre><code>func logoAnimate(animatedImage: UIImageView!, animatedLabel: UILabel!) {
          UIView.animate(withDuration: 1.5, delay: 1, options: [.allowAnimatedContent]) {
          animatedImage.topAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.topAnchor, constant: 5).isActive = true
          animatedImage.leftAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.leftAnchor, constant: 94).isActive = true
  
      }   completion: { (true) in
          UIView.animate(withDuration: 0.25) {
              animatedLabel.alpha = 1
        }
        
      }
  }
  </code></pre>