The target part from localization key get not the remapped key.
No exception with ServerProfile-Session!

Exception:

  
SQL error occured.
SQL error details 'Type: ReferentialConstraintViolation;'
Query 'INSERT INTO [CountryLocalization] ([CultureName], [Target.Id], [PostalText],
 [OfficialText], [AdditionalText], [Text]) VALUES (@p0_0, @p0_1, @p0_2, @p0_3, @p0_4, @p0_5); [p0_0='en-US';p0_1='-1';p0_2='';p0_3='';p0_4='';p0_5='TestCountry']'
Original message 'A foreign key value cannot be inserted because a corresponding primary key value does not exist. [ Foreign key constraint name = FK_CountryLocalization_Target_Country ]'

Example:

  
using( var session = domain.OpenSession( new SessionConfiguration( SessionOptions.ClientProfile ) ) )
{
  new Country( session ) { Text = "TestCountry", Code2 = "TE", Code3 = "TES",
                           CodeInt = 1000 };
  // Exception
  using(session.Activate())
    session.SaveChanges();
}