Summary
If you have an old version of WBS Gantt-Chart for Jira (x.x.x6a or earlier), make sure you uninstall this before reinstalling the latest version. You may lose data otherwise.
Workaround
See above.
If you have an old version of WBS Gantt-Chart for Jira (x.x.x6a or earlier), make sure you uninstall this before reinstalling the latest version. You may lose data otherwise.
See above.