I'm currently using a select list (single choice) custom field to allowed users to enter a number between 1-20 as a simple method for them to rank internal priority score. Its a company managed project so i dont want to abuse the priority field more than everyone else already has.
Is there a way to do the following?
1. Make each choice unique so that there can only be 1 of each number associated to a ticket while its open.
2. When a ticket closes the number updates. e.g. we close out a ticket ranked 4, so every number greater than 4 decreases by 1/moves them up the rankings