Allow unassigned stories in project.

[Marko]

I have agile (Boards) project. 

When I create new story it is automatically assigned to me. And if I delete assignee it is automatically assigned again to me.

In global settings I have Allow unassigned issue to YES.

[Chander Inguva · Accepted solution]

Hey marko,

                  If you are a project lead of that JIRA project and if you have set default assignee to Project Lead, any issue created will be assigned to you. Check Project Permissions.

[Joe Pitt]

then you can't have issues unassigned. that is a JIRA wide, not project level, setting. From a practical standpoint unassigned issues aren't worked reliably.