I tried many ways to fix this error. I relatively new to IOS programming.

This is the error I keep getting

(Invalid update: invalid number of sections. The number of sections contained in the table view after the update (1) must be equal to the number of sections contained in the table view before the update (0), plus or minus the number of sections inserted or deleted (0 inserted, 0 deleted). Table view: <UITableView: 0x106827800; frame = (0 0; 393 852); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x600000c6f030>; backgroundColor = <UIDynamicSystemColor: 0x60000175a8c0; name = tableBackgroundColor>; layer = <CALayer: 0x600000239820>; contentOffset: {0, -59}; contentSize: {393, 44}; adjustedContentInset: {59, 0, 34, 0}; dataSource: <tables_final.ItemsViewController: 0x105b06220>>”)

The code is to make a table here is the code below

import UIKit

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?
    

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
        guard let _ = (scene as? UIWindowScene) else { return }
        
        let itemStore = ItemStore()
        
        let itemController = window!.rootViewController as! ItemsViewController
        
        itemController.itemStore = itemStore
    }

import UIKit

class Item: Equatable {
    var name: String
    var valueInDollars: Int
    var serialNumber: String?
    var dateCreated: Date
    
    init(name: String, serialNumber: String?, valueInDollars: Int) {
        self.name = name
        self.valueInDollars = valueInDollars
        self.serialNumber = serialNumber
        self.dateCreated = Date()
    }
    
    
    convenience init(random: Bool = false) {
        if random {
            let adjectives = ["Fluffy", "Rusty", "Shiny"]
            let nouns = ["Bear", "Spork", "Mac"]
            
            let randomAdjectives = adjectives.randomElement()!
            let randomNoun = nouns.randomElement()!
            
            let randomName = "(randomAdjectives) (randomNoun)"
            let randomValue = Int.random(in: 0..<100)
            let randomSerialNumber = UUID().uuidString.components(separatedBy: "-").first!
            
            self.init(name: randomName, serialNumber: randomSerialNumber, valueInDollars: randomValue)
            
        } else {
            self.init(name: "", serialNumber: nil, valueInDollars: 0)
        }
    }
    
    static func ==(lhs: Item, rhs: Item) -> Bool {
        return lhs.name == rhs.name && lhs.serialNumber == rhs.serialNumber && lhs.valueInDollars == rhs.valueInDollars && lhs.dateCreated == rhs.dateCreated
    }
    
}

class ItemStore {
    
    var allItems = [Item]()
    @discardableResult func createItem() -> Item {
        let newItem = Item(random: true)
        
        allItems.append(newItem)
        
        return newItem
    }
    
    func removeItem(_ item: Item) {
        if let index = allItems.firstIndex(of: item) {
            allItems.remove(at: index)
        }
    }
    
    func moveItem (from fromIndex: Int, to toIndex: Int) {
        if fromIndex == toIndex {
            return
        }
        
        let movedItem = allItems[fromIndex]
        
        allItems.remove(at: fromIndex)
        
        allItems.insert(movedItem, at: toIndex)
    }
/*
    init() {
        for _ in 0..<5 {
            createItem()
        }
    }
*/
}


class ItemsViewController: UITableViewController {

    var itemStore: ItemStore!
    
    @IBAction func toggleEditModel(_ sender: UIButton) {
        if isEditing {
            sender.setTitle("Edit", for: .normal)
            
            setEditing(false, animated: true)
        } else {
            sender.setTitle("Done", for: .normal)
            
            setEditing(true, animated: true)
        }
    }
    
    
    
    @IBAction func addNewItem(_ sender: UIButton) {
        
        let newItem = itemStore.createItem()
        
        if let index = itemStore.allItems.firstIndex(of: newItem) {
            let indexPath = IndexPath(row: index, section: 0)
            
            tableView.insertRows(at: [indexPath], with: .automatic)
        }
        
    }
    
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }


    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return itemStore.allItems.count
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return itemStore.allItems.count
    }
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        // #warning Incomplete implementation, return the number of rows
        let cell = tableView.dequeueReusableCell(withIdentifier: "UITableViewCell", for: indexPath)
        
        let item = itemStore.allItems[indexPath.row]
        
        cell.textLabel?.text = item.name
        cell.detailTextLabel?.text = "(item.valueInDollars)"
        
        return cell
    }
    
    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            let item = itemStore.allItems[indexPath.row]
            itemStore.removeItem(item)
            tableView.deleteRows(at: [indexPath], with: .automatic)
        }
    }
    
    override func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
        itemStore.moveItem(from: sourceIndexPath.row, to: destinationIndexPath.row)
    }

}