I want a script that will auto-increment the number field that is "Issue Ranking" having numbers from 1 to 100. So when I create an issue and manually number that issue say - 49(edit that issue ) then I need that the already existing 49 should become 50 and already existing 50 should become 51.. that is, it should automatically increment itself on the basis of what number I have selected in the recently created ticket.
similarly when I number the issue manually as 30 then already existing should be 31 and already existing 31 should be 32 and so on... .
can someone please help?