Как использовать две модели данных?

#1

В проекте предполагается использовать много моделей данных.
Вопрос, как прописать вторую модель данных?

class CoreDataStack {
// MARK: - Core Data stack

lazy var persistentContainer: NSPersistentContainer = {
    let container = NSPersistentContainer(name: "Array")
    container.loadPersistentStores(completionHandler: { (storeDescription, error) in
        if let error = error as NSError? {
            fatalError("Unresolved error \(error), \(error.userInfo)")
        }
    })
    return container
}()

// MARK: - Core Data Saving support

func saveContext () {
    let context = persistentContainer.viewContext
    if context.hasChanges {
        do {
            try context.save()
        } catch {
            let nserror = error as NSError
            fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
        }
    }
  }
}
#2

Пытался тупо создать второй CoreDataSteck, но икскоду не нравится…

class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?
lazy var coreDataStack = CoreDataStack()
lazy var coreDataStack2 = CoreDataStack2()

второй CoreDataSteck

 class CoreDataStack2 {
// MARK: - Core Data stack

lazy var persistentContainer2: NSPersistentContainer = {
    /*
     The persistent container for the application. This implementation
     creates and returns a container, having loaded the store for the
     application to it. This property is optional since there are legitimate
     error conditions that could cause the creation of the store to fail.
     */
    let container2 = NSPersistentContainer(name: "Array2")
    container2.loadPersistentStores(completionHandler: { (storeDescription, error) in
        if let error = error as NSError? {
            // Replace this implementation with code to handle the error appropriately.
            // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
            
            /*
             Typical reasons for an error here include:
             * The parent directory does not exist, cannot be created, or disallows writing.
             * The persistent store is not accessible, due to permissions or data protection when the device is locked.
             * The device is out of space.
             * The store could not be migrated to the current model version.
             Check the error message to determine what the actual problem was.
             */
            fatalError("Unresolved error \(error), \(error.userInfo)")
        }
    })
    return container2
}()

// MARK: - Core Data Saving support

func saveContext () {
    let context2 = persistentContainer2.viewContext
    if context2.hasChanges {
        do {
            try context2.save()
        } catch {
            // Replace this implementation with code to handle the error appropriately.
            // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
            let nserror = error as NSError
            fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
        }
    }
}

}

Ведает такую ошибку:
Terminating app due to uncaught exception ‘NSInternalInconsistencyException’, reason: ‘NSFetchRequest could not locate an NSEntityDescription for entity name ‘Entiry’’
*** First throw call stack:
и там куча всего…

Может есть у кого какие идеи?)