The fathers had gone to court, after a conflict with the museum over the ownership of the collection. The NMVW has operated the now closed Africa Museum since 2014. Both parties believed they were the owners of the museum collection.
The court in Arnhem has now ruled that almost the entire collection has been given on loan to the NMVW by the priests, because preserving it was of great importance to them, says the judge. Only the inventory of the museum is owned by the NMVW. So the rest must be returned to the priests.
The second link contains the court ruling in Dutch.