Problem

After updating JIRA Agile add-on to the latest version :

• Resulted in an error & the JIRA Agile got disabled
• Tried to enable it, and got a time-out error
• Restarted JIRA worked. 

But the sprint link field for all tickets was removed. So, now all active and planned sprints are empty.

Cause

JIRA did not re-index completely .

Resolution

Re-index JIRA

• Search Indexing