New Post: Why EF Reinsert existing records?

I've implemented class to create database for installation ...

It work great and it create database correctly.

The problem is when i try to insert default Data on empty database ...





1°) It add new permission correctly and return permission with ID = 1

2°) It add new role but it recreate new permission with ID = 2. (the permission values was replaced by new one)

3°) It add new account but it recreate new role with ID = 2 and new permission with ID = 3. (the permission and role values was replaced by new one)

then finally i have permission with ID = 3, role with ID = 2 and Account with ID = 1

Do you know how can i solve this?

I use Unity repository in my project

Thank you

public virtual void InstallData(string defaultUserName, string defaultUserPassword)
        {
            Permission permission = _permissionService.AddNewPermission("CanAccessAdminArea", "Can access admin area");
            Role role = _roleService.AddNewRole("Supervisor", "Supervisor role", permission);
            Account account = _accountService.AddNewAccount(defaultUserName, defaultUserPassword, role);
        } 

public Permission AddNewPermission(string Name, string Description)
        {
            Permission result = new Permission
            {
                Name = Name,
                Description = Description
            };
            _permissionRepository.Insert(result);
            return result;
        }
public Role AddNewRole(string Name, string Description, Permission permission)
        {
            Role result = new Role
            {
                Name = Name,
                Description = Description,
            };
            result.Permissions.Add(permission);
            _roleRepository.Insert(result);
            return result;
        }
public Account AddNewAccount(string Username, string Password, Role role)
        {
            Account result = new Account
            {
                Username = Username,
                Password = Password,
                CreatedOn = DateTime.Now,
                Role = role
            };
            _accountRepository.Insert(result);
            return result;
        }

public virtual void Insert(T entity)
        {
            try
            {
                if (entity == null)
                    throw new ArgumentNullException("entity");


                this.Entities.Add(entity);


                this._context.SaveChanges();
            }
            catch (DbEntityValidationException dbEx)
            {
                var msg = string.Empty;


                foreach (var validationErrors in dbEx.EntityValidationErrors)
                    foreach (var validationError in validationErrors.ValidationErrors)
                        msg += string.Format("Property: {0} Error: {1}", validationError.PropertyName, validationError.ErrorMessage) + Environment.NewLine;


                var fail = new Exception(msg, dbEx);
                //Debug.WriteLine(fail.Message, fail);
                throw fail;
            }
        }