Hi there, it's as 'simple' as that really!
For a given subset of services we'd like to (politely!) force the user to set a fixVersion (release) when the sprint field is set - certainly when Sprint was previously empty, also helpful if it's being changed too.
We don't want to do it via Workflow because the issue may not be transitioning when this Sprint field is being set / changed, and it could occur at several different statuses.
Is this possible? Many thanks in advance 
Simon