While doing the vivec informants quest, I went to Tel Fyr and accidentally clicked on "Give him the Dwemer artifact Caius Gave you" which shouldnt have been selectable, since I wasnt anywhere near there in the plotline. After a couple of hours of research, I found out that this set the journal index of a2_3_corpruscure to 15, fast fowarding me in the main line quest. How do I remove the corpuscure entry in the journal or set it back to 0? SetJournalEntry doesnt seem to work. Im nearly finished in the mages guild and the telvanni guild and I dont want to start the game over. Any help would be appreciated.

Try player->SetJournalIndex "Journal_name" 0


Check in the editor to make sure you set the index to the number it should be