Core Data

So I was just following along with CodeWithChris's video on make a persistent data storage (https://youtu.be/O7u9nYWjvKk) and I got to the part where he says to include the subclass NSManagedObject to the family and person classes. I have a very similar program with recipe and list of recipes, but when I add "NSManagedObject" I get an error:

< unknown >:0: error: stored property '_title' requires an initial value CoreData.NSManagedObject:2:12: note: superclass 'NSManagedObject' requires all stored properties to have initial values open class NSManagedObject : NSObject {

< unknown > :0: error: stored property '_calories' requires an initial value CoreData.NSManagedObject:2:12: note: superclass 'NSManagedObject' requires all stored properties to have initial values open class NSManagedObject : NSObject {

etc.

Unsure of how to fix it. Any help would be greatly appreciated.

Code in case I'm missing something

RecipeList:

import Foundation
import CoreData

class RecipeList:NSManagedObject, Identifiable{
    @Published var recipeList:[Recipe]

    init(){
        recipeList=[]
    }

    func addRecipe(recipe: Recipe){
        self.recipeList.append(recipe)
    }

    func removeRecipe(loc: Int){
        self.recipeList.remove(at: loc)
    }

    func getList() -> Array<Recipe>{
        return recipeList
    }
}

Recipe:

import Foundation
import UIKit
import CoreData

class Recipe:NSManagedObject, Identifiable{
    @Published var title: String
    @Published var calories: String
    @Published var ingredients: Array<String>
    @Published var instructions: Array<String>
    @Published var totalTime: String
    @Published var notes: String

    init(title: String, calories: String, ingredients: Array<String>, instructions: Array<String>, totalTime: String, notes: String){
        self.title=title
        self.calories=calories
        self.ingredients=ingredients
        self.instructions=instructions
        self.totalTime=totalTime
        self.notes=notes
    }
}