症状

User will see duplicate gadgets listed when adding new JIRA gadget in dashboard.

診断

The current JIRA instance is connected with another JIRA instance. Take note on the URL of the original gadget and duplicated gadget which both having almost similar url but different context path.

原因

User may have multiple gadget subscription on the same type of gadget which pointing to different JIRA instance.

ソリューション

1. Navigate to the dashboard then select add a new gadget and click on the Gadget Subscription button(located in bottom part). 
2. Remove the duplicated gadget subscription.