I asked a question and then saw that in the logs posted, there was some identifying information for me or my employer/client etc. Since I did not want it to remain visible in the edit history, I immediately deleted the question myself. I then cleaned up the log by masking the information, and tried to submit the question. Now it just says that this is the duplicate of another question (i.e., my deleted question). How can I submit this question?
In the future, if you have content that you don't really want in a question, flag it for moderator attention. We can alert the SE team and they'll remove the identifying information (if you tell us what that is). The problem with your approach is that the information is still out there; it's just only visible to 10K users and moderators.