Why weren't these last B747-400's built?

Aviation Notable Activity
1

Anyone know why these last 747-400’s were never built?

http://www.planespotters.net/Production_List/Boeing/747/747-400/index.php?sort=ln&dir=desc

2

The order could have been canceled or Lufthansa opted for another version of the 747 in place of the -400.

3

those 4 changed to -8

4

That’s what I thought but I didn’t feel like researching more. Thanks for the confirmation.