CoreData Stops the saving after Heavyweight migration Xcode 14 - swift

Question

Due to the enhancement in my project, I have done the heavyweight migration, now after heavy weight migration, CoreData is unable to store data it always return empty.
I have a class Function
class func insert(object: [String: Any], entityName: String) -> NSManagedObject? {
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: entityName, in: context)!
let managedObject = NSManagedObject(entity: entity, insertInto: context)
let keys = Array(entity.attributesByName.keys)
print("Keys:\(keys)\nobject:\(object)")
for (key, element) in object {
if keys.contains(key) {
managedObject.setValue(element, forKey: key)
}
}
do {
print(managedObject.isUpdated)
try context.save()
print(managedObject.isUpdated)
print("Success insert")
} catch {
print("Error in Insert: \(error)")
}
return managedObject
}
so I pass my Object with the key value pair in form of Dictionary, I pass the entityName to this function so it never return nil in managedObject While it always show false on print(managedObject.isUpdated) on both lines. Here is my console logs for saving data.
Keys:["contactIdentifier", "timeAndDate", "receiverId", "createdAt", "updatedAt", "i-----------g", "se---d", "duration", "senderId", "number", "name", "isFromiOS", "opponentsIds", "m-------d"]
object:["sessionID": "E1ECAB27-D312", "message": "--------", "contactIdentifier": "------- ", "I----p": "1", "contactNumbers": "------------,-----------", "V-----l": "1", "co------pe": "2", "createdAt": 2022-10-27 11:58:18 +0000, "opponentsIds": "---, ----"]
false
false
Success insert
updateCallInformation:<CallHistory2: 0x2835e99f0> (entity: CallHistory2; id: 0xa46b7d533bd5d14b <x-coredata://BAF5AFD6-8567-4485-8938-E13D3BD7B314/CallHistory2/p1>; data: {
contactIdentifier = "MDanishPK ";
createdAt = "2022-10-27 11:58:18 +0000";
duration = nil;
incomingOutgoing = nil;
isFromiOS = 0;
missedReceived = nil;
name = nil;
number = nil;
opponentsIds = nil;
receiverId = nil;
senderId = nil;
sessionID = "E1ECAB27-D312-4402-91D3-87AEBAC1A709";
timeAndDate = nil;
updatedAt = nil;
})
In console ---- I added intentially here for the privacy. There are some proper values and keys here.
If I revert my migration and goto the older branch using git than its working fine and save data properly. But I need heavy weight migration which I achieved using this article Kindly help me out and guide me what I have to do To save managedObject? and what I am doing wrong in saving managedObject? I changed all the table name but still its not saving data. On every launch I also lost the data.
Update Question
After Insert data I am using this fetch method, It always return me 0 against the array of [NSManagedObject]?
class func fetchList(entityName: String, predicate: NSPredicate? = nil, sortBy: [(key: String, ascending: Bool)]? = nil) ->
[NSManagedObject]? {
let context = CoreDataStack.context
let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: entityName)
fetchRequest.predicate = predicate
if let sortedBy = sortBy {
var sortDescriptors = [NSSortDescriptor]()
for sortElement in sortedBy {
let sortDescriptor = NSSortDescriptor(key: sortElement.key, ascending: sortElement.ascending)
sortDescriptors.append(sortDescriptor)
}
fetchRequest.sortDescriptors = sortDescriptors
}
do {
let results = try context.fetch(fetchRequest)
return results
} catch {
print("Could not fetch: \(error)")
}
return nil
}