Duplicating record in Insert (Add or AddAsync)

The System runs in Private Cloud and in the test environment I have no problem, but in the production environment at times the Insert duplicates the information generating the same record but as subsequent keys.

The code demonstrates what I basically do using the layer with Entity Framework. I’ve done several tests and I can’t understand why this duplication sometimes in the registrations, I have a network with more than 20 people working on this Web system

Example

[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Create(AccountSchedule model)
{
	if (ModelState.IsValid)
	{
		using IDbContextTransaction transaction = UnitOfWork.BeginTransaction();
		try
		{
			UnitOfWork.AccountSchedule.Add(model);
			UnitOfWork.Commit();
			transaction.Commit();
			TempData.AddSuccessCreate();
			return RedirectToAction(nameof(Edit), new { model.Id });
		}
		catch (Exception)
		{
			transaction?.Rollback();
		}
	}
	ViewData.AddError();
	await LoadSelectAsync(model);
	return View("CreateOrUpdate");
}

Code

var options = new DbContextOptionsBuilder<DataAccess>();
options.UseMySQL("Server=localhost;Database=dB;Uid=test;Pwd=232367");
options.LogTo(Console.WriteLine);
using DataAccess dataAccess = new DataAccess(options.Options);
using var transaction = dataAccess.Database.BeginTransaction();
AccountSchedule accountSchedule = new()
{
	AccountTypeId = 1,
	Description = "Example Issue",
	Value = 10.9M,
	ExpirationDay = 10,                
	Active = true
};
dataAccess.AccountSchedule.Add(accountSchedule);
dataAccess.SaveChanges();
transaction.Commit();

Ouput SQL

Executing DbCommand [Parameters=[
@p0='?' (DbType = Int32), 
@p1='?' (DbType = SByte), 
@p2='?' (DbType = DateTime), 
@p3='?' (Size = 300), 
@p4='?' (DbType = Int32), 
@p5='?' (DbType = Decimal)], CommandType='Text', CommandTimeout='30']
INSERT INTO `account_schedule` (`account_type_id`, `active`, `deleted_at`, `description`, `expiration_day`, `value`)
VALUES (@p0, @p1, @p2, @p3, @p4, @p5);
SELECT `id`
FROM `account_schedule`
WHERE ROW_COUNT() = 1
AND `id`=LAST_INSERT_ID();

Further technical details

MySQL version: 8.0.28 Operating system: Windows Server 2019 Standard Edition Pomelo.EntityFrameworkCore.MySql version: 5.0.4 Microsoft.AspNetCore.App version: net5.0

[mguinness]

Any soft delete functionality should be implemented in EF Core not at the provider level, i.e. this is universal, not provider specific.

[mguinness]

I even have a package for EF that does a non-physical deletion of the record, would that be too difficult to put in Pomelo? (https://www.nuget.org/packages/Canducci.SoftDelete/)

Any soft delete functionality should be addressed upstream, it’s under consideration in https://github.com/dotnet/efcore/issues/22959 so please upvote.