Change setting of Allow unassigned issues Turn OFF

[Admin Jira]

Hi Expert ,

I want to change setting for allow unassigned issues to turn OFF , below i got the error 

Allow unassigned issues

Cannot turn off "Allow unassigned issues" as there are 1 issue(s) that are unassigned. Please assign these issues before disabling Unassigned Issues. N.B. You may not have permissions to view all of these issues

When I select that 1 issue I can't find this issue on issue list , even filter unassigned.

So I can't edit this setting.

Please help me to solve this issue.

Thanks,

[Filipe Santos]

I tried Nic's suggestions and none of them worked for me.

After some wandering around I realized one of our issue types had the Assignee field hidden in Field Configuration. When I changed it to not hidden, the JQL "assignee IS EMPTY" started showing the issues that were preventing me from disallowing unassigned issues

[Nic Brough -Adaptavist-]

That suggests you have project permissions or issue security that is stopping you from seeing the issue, or your index may be damaged in some way.  To work these out:

When you go to the main user list of projects off the main menu, count how many you can see there.  Then go to admin -> projects and see how many there are in there.  If the number is different, there are projects you can't see as a users, and your issue is probably lurking in there.

Go to admin -> issue security and check out the schemes - are there any that might be hiding an issue from you?

Try re-indexing

If it's none of those, your last resort is to look in the database - you need something like

select * from jiraissue where assignee = ""

to look for the empty assignee field.  You'll then need to have a look at why the index is failing to pick that up (because that's what the check is being done on)