I have a suggestion since, we are not perfect. but please when something like this happens its kinda annoying.
I know it's my fault but im just a concern citizen. please make a solution for this. and i am willing to pay for it if its required.
why not display what is the ID# of the item thats causing this warning. setting the server on pre renewal mechanics some item effect on the pre_renewal database are based on renewal.
Example
[Warning]: pc_bonus: the Item Name(ID#) got an unknown type 0 -5 !