✅ EF Core doesn't stop tracking list items.

public async Task<OfficeDTO?> EditOfficeAsync(OfficeEditDTO editedOffice)
{
    var office = await dbContext.Offices.Include(o => o.Address)
                                         .Include(o => o.SalesPeople)
                                         .FirstOrDefaultAsync(o => o.Id == editedOffice.Id);

    if (office == null)
        return null;

    var selectedSalesPeopleIds = office.SalesPeople.Select(o => o.Id).ToList();


    if (editedOffice.Name != null)
        office.Name = editedOffice.Name;

    if(editedOffice.Address != null)
    {