Make field required only for one state transition

Original request description:

The reporter can not add an issue when he has no resolve permissions and the "fixed Version" field is a required field.

As a JIRA Administrator I want a "Fixed version" to be a required field when resolving. But it seems illogical that someone reporting an issue should enter the field. This applies to other fields as well.

Workaround

I'm updating the original workarounds with the steps on how to use this feature:

The Field Required Validator for workflow transitions was incorporated into JIRA Cloud as a native feature in 2016.

To use the example from the original post, here is how I added a validator to a single transition of a workflow in my company-managed software project:

You should add a transition screen (not pictured) that contains the required field so that the user is able to give it a value during the transition.

Here's what I see if I try to transition an issue to Done, without it having a value in the Fix versions field:

Note: There is no red asterisk next to the Fix version field, because it is required by a workflow validator (unlike the Description field, which has been made required in a Field Configuration). There is a feature request to add such UI highlight, here: JRACLOUD-76479 – Make validator required fields more visible on screens

I will not see the above error on any other transitions, as the validator only exists in the transition between the statuses In Progress and Done.