When a user transitions to a new status, a screen appears that requires the user to enter a unique value for the "Serial Number" text field.
If the user enters a duplicate serial number, I want to prevent the transition, and show an alert (either in the transition screen or on the main screen) that says "You have entered a duplicate serial number".
How can I achieve this, either out of the box, or with a Jira app?
Thanks for your help.