first hear about such a bug
anyway:
1) Try to delete your skill from DB and add it again
2) Do you even have this skill (maybe you changed you id to this PM NPC one ... :P) - so this could be reason??
)
3) could say check cq_itemtype but if you saying it worked before....
and about my MSG_server ... run different and check .... well I never had such a problem and its hard to say what ... can only help in ideas
P.S. this query I gave there - is not about magics etc... it has only action under lock, knights, PP ......
Regards