How to make Sprint field not required for Kanban boards?

[Flavio Beck]

I have a default workflow for bugs, applied for both Scrum and Kanban projects.

I need to set Sprint field as mandatory during a transition "to do".

for Scrum projects, its OK, but I need to skip this validation if the it is a kanban project.

Should be possible to have a script validation ?

eg.:

if issue.boardtype = kanban {

     setfieldrequired(Sprint).false

} else {

     setfieldrequired(Sprint).true

}

[Alexandra Smith]

If they are different projects what is the harm in having two workflows? Or is this a single project that is displayed on two boards?