I guess you so desperate to mark void like most good worker at IRI who are NILL in insight as why duplicate entry happened!! A simple brain knows there is no need to mark duplicate when already correct been posted few moments back!! That could be NWK Glitch or Web-Page Back/Refreshed!!
There always comes a post "use censorship in right way" which almost none know about but so willing to quick mark & grab some useless points!!
I think you got what you needed so badly by a desperate Void Mark!!