It seems that the Ryanair deal does not include some airport slots.
Reuters state "KLM said the value of the deal to the Dutch group was about 30 million euros -- higher than the 23.9 million euros paid by Ryanair -- because it would also receive valuable airport slots and other items from Ryanair following the sale."
No doubt Ryanair now have a no compete clause at Amsterdam. They probably handed back the slots at FRA, DUS and CDG.