     internal func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
         // Peek and pop - Present a VC preview when force touching it
         if let indexPath = tableView.indexPathForRow(at: location) {
+            if indexPath.section == 0 {
+                return nil
+            }
             previewingContext.sourceRect = tableView.rectForRow(at: indexPath)
             
             let vc = storyboard?.instantiateViewController(withIdentifier: "TaskVC") as! TaskVC

        title = "Schedule"
        
        NotificationCenter.default.addObserver(self, selector: #selector(willEnterForeground), name: .UIApplicationWillEnterForeground, object: nil)
        
        getData()
        setUp()


            let navVC = UINavigationController(rootViewController: vc)
            navVC.title = "\(vc.clas.name)"
            
            return navVC
            
        }
        return nil
