I solved it.
There's an issue in showing the requirements for spiral pierce at the skill tree. It shows that it's necessary to have spear master at level 5 only, but it actually needs to be at level 10.
Update: I have a renewal skill tree view on a pre-renewal server.
@Dastgir
I merged my grf with the pre-renewal data from the translation project like it is written in Pre-Renewal/Readme.txt, but i still have that error.
I think this is an issue in the Translation/Pre-Renewal/data-Folder somewhere. Maybe it should provide an updated skillinfo/skilltreeview.lub