Before implementation of this new system, I found that many skill points of my players have been automatically assigned.
These players are in my L32 team which has no history of skill points automatically applying unassigned sp. These players are 1 sp away from next star. I accumulated several sp for each of these players so I can clearly remember. Only unassigned sp are still present for those players whom sp have been locked by incoming negotiation offers. Luckily, for all these players I have set a SA for future training and now all sp are assigned to SA training and the players have not yet been added a new star.
I will sell all these players in these 2 days. I also hope to warn other managers.