I'd like to autogenerate some tickets from a csv file containing a list of issues. I was going to do that by generating emails to our ServiceDesk mailbox. Eg with subject "Install Windows 11 on xxx", or "Remove xxx from computer yyy".

The problem is that if I do this again in a week with a fresh file, some of them will be duplicates of requests from the week before, if any of them haven't been resolved by the time I generate the new csv file.

Is there any way to block the creation of a ticket with an identical subject line to an existing one?