ASP.Net Core Update Entity Hatası

Arkadaşlar User güncellemeye çalışırken şu hatayı alıyorum:
An unhandled exception occurred while processing the request.
InvalidOperationException: The instance of entity type 'AppUser' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked. When attaching existing entities, ensure that only one entity instance with a given key value is attached. Consider using 'DbContextOptionsBuilder.EnableSensitiveDataLogging' to see the conflicting key values.

Kod bloğum şu şekilde:

[HttpPost]
        public async Task<IActionResult> Edit(UserDTO model)
        {
            AppUser user = await _userManager.FindByNameAsync(User.Identity.Name);
         
            if (ModelState.IsValid)
            {
                user = mapper.Map<AppUser>(model);
                if (model.Password != null)
                {
                    user.PasswordHash = _passwordHasher.HashPassword(user, model.Password);
                }
                IdentityResult result = await _userManager.UpdateAsync(user);
               

                if (result.Succeeded)
                {
                 
                    uow.SaveChange();
                    await _signInManager.SignOutAsync();
                    return Redirect("/Account/Login");
                }
                else
                {
                    foreach (var item in result.Errors)
                    {
                        ModelState.AddModelError("", item.Description);
                       
                    }
                }
            }
           
            return View(user);

        }

Not: Sosyal medya projesi yapıyorum. AppUser tablosundan 2 adet ForeignKey üretiyorum.