Symptoms

Some or all the the Calendar is missing after the upgrade from Team Calendar 3.x or below.

Cause

The Calendar content was not properly migrated to the new Active Object Tables.

Resolution

1. Clear plugin cache
2. Rebuild indexes from scatch

3. Go to this URL <Confluence base URL>/admin/calendar/migratetoactiveobjects.action

4. Click the Migrate button to migrate the content
5. If the problem persists after that, please do the following:

   1. Click the Delete button to remove all the Active object table.

      If you have any created or edited any Team Calendars for Confluence content after the Team Calendars for Confluence is updated these changes will be lost!

   2. After the deletion is done. Click the Migrate button to migrate the content.