I respect your hard working on chasing duped items, but is there any hope that we can totally solve this issue?
Just chasing duped items is not helpful; it encourages criminals to dupe more items because there is no cost in duping, and this makes a terrible loop:
players buy the duped item--->GM delete them--->players buy the duped items again, normal players are the only victims in this loop and criminals can make endless profit from it.
As far as I know TwRO and JRO also had dupe problem in the past but finally their GM fixed it.
There should be someway to solve it, unless Gravity has already give up IRO server(I do feel they have such tendency, Gravity use IRO as test server for JRO items before they introduce those items to KRO, they also cut off players from EU and Taiwan, and we never receive patches in time)