Symptoms

In JIRA, when moving a single issues from one Issue Type to another, the operation fails with the error:

The issue type selected is invalid

Diagnosis

Within Issue Type Schemes in the admin console all issue types should be in the Default Issue Type Scheme.

Cause

In JIRA, Default Issue Type Scheme is the list of Global issue types AND all newly created Issues types will automatically be added to this scheme. But in some cases a problem occurs and the target issue type is not included in 'Default Issue Type Scheme'.  
 

By Design: 

Issue Types Cannot Be Removed From Default Issue Type Scheme or added if it is not added at time of creation.
There Is a feature Request to address this functionality but it does not exist yet.
Feature Request Viewable Here:  JRA-11222 - Getting issue details... STATUS

Workaround

• Use the following JQL Query to search under advanced issue search option in your issue navigator (Note: Remove the "<>" when inserting project specific info)

  project = <Insert Project Here> AND key = <Insert Key Here>

  
  

• Select TOOLS drop down

• Select Bulk Change all 1 issues

• Select the single issue
• Select Move Issues: Move issues to new projects and issue types
• Set The Desired Issue Type for issue type
• Choose if you want to be notified
  

• Confirm

• This will Move the Issue to the new issue type but will not fully fix the problem, The full fix requires a Database Edit and you will have to:

  • Submit A Support ticket at: https://support.atlassian.com

  • Reference this article and the following Knowledge base article for the steps to Fix:

    • Issue type invalid error thrown when moving an issue to another type in Jira server