System.Text.Json.JsonException in System.Text.Json.dll Error deserializing ../Data\clients.json: The JSON value could not be converted

I am working on an ASP.NET Core project to migrate data from multiple JSON files into an SQLite database. Below is the DataMigration class I wrote for this purpose:

using System.Text.Json;namespace CargoHub{    public class DataMigration    {        private readonly AppDbContext _context;        public DataMigration(AppDbContext dbContext)        {            _context = dbContext;        }        public async Task<List<string>> MigrateData(string folder = "../Data")        {            var processedFiles = new List<string>();            var jsonFiles = Directory.GetFiles(folder);            foreach (var jsonFile in jsonFiles)            {                try                {                    await ProcessFile(jsonFile);                    processedFiles.Add(jsonFile);                }                catch (Exception ex)                {                    Console.WriteLine($"Error processing {jsonFile}: {ex.Message}");                }            }            return processedFiles;        }        private async Task ProcessFile(string filePath)        {            string fileName = Path.GetFileNameWithoutExtension(filePath);            switch (fileName)            {                case "clients":                    var clients = await DeserializeJson<List<Client>>(filePath);                    await SaveToDatabase(clients);                    break;                // Uncomment to handle more file types                // case "inventories":                //     var inventories = await DeserializeJson<List<Inventory>>(filePath);                //     await SaveToDatabase(inventories);                //     break;                case "item_groups":                    var itemGroups = await DeserializeJson<List<ItemGroup>>(filePath);                    await SaveToDatabase(itemGroups);                    break;            }        }        private async Task<List<T>> DeserializeJson<T>(string filePath)        {            try            {                var jsonData = await File.ReadAllTextAsync(filePath);                return JsonSerializer.Deserialize<List<T>>(jsonData)!;            }            catch (Exception ex)            {                Console.WriteLine($"Error deserializing {filePath}: {ex.Message}");                return new List<T>();            }        }        private async Task SaveToDatabase<T>(List<T> entities) where T : class        {            if (entities.Count == 0) return;            _context.AddRange(entities);            int changedRows = await _context.SaveChangesAsync();            Console.WriteLine(changedRows);        }    }}

Here's the Client model that represents the structure of the clients.json file:

using System.Text.Json.Serialization;namespace CargoHub{    public class Client : BaseModel    {        [JsonPropertyName("id")]        public int Id { get; set; }        [JsonPropertyName("name")]        public string? Name { get; set; }        [JsonPropertyName("address")]        public string? Address { get; set; }        [JsonPropertyName("city")]        public string? City { get; set; }        [JsonPropertyName("zip_code")]        public string? ZipCode { get; set; }        [JsonPropertyName("province")]        public string? Province { get; set; }        [JsonPropertyName("country")]        public string? Country { get; set; }        [JsonPropertyName("contact_name")]        public string? ContactName { get; set; }        [JsonPropertyName("contact_phone")]        public string? ContactPhone { get; set; }        [JsonPropertyName("contact_email")]        public string? ContactEmail { get; set; }    }}

The BaseModel class looks like this:

namespace CargoHub{    public class BaseModel    {        [JsonPropertyName("created_at")]        public DateTime? CreatedAt { get; set; }        [JsonPropertyName("updated_at")]        public DateTime? UpdatedAt { get; set; }    }}

Here is an example of the clients.json file I am trying to process:

[    {"id": 1,"name": "Raymond Inc","address": "1296 Daniel Road Apt. 349","city": "Pierceview","zip_code": "28301","province": "Colorado","country": "United States","contact_name": "Bryan Clark","contact_phone": "242.732.3483x2573","contact_email": "robertcharles@example.net","created_at": "2010-04-28 02:22:53","updated_at": "2022-02-09 20:22:35"    },    {"id": 2,"name": "Williams Ltd","address": "2989 Flores Turnpike Suite 012","city": "Lake Steve","zip_code": "08092","province": "Arkansas","country": "United States","contact_name": "Megan Hayden","contact_phone": "8892853366","contact_email": "qortega@example.net","created_at": "1973-02-24 07:36:32","updated_at": "2014-06-20 17:46:19"    }]

The Issue

Even though I named all the properties in my Client class to match the JSON structure, I still encounter issues when deserializing the data. Specifically, some fields are not being populated correctly.

I have already tried removing the [JsonPropertyName] attributes, but the problem persists.

What could I be missing in the deserialization process, or is there something else wrong with my approach?

Any help would be appreciated!