Viewing your question, it actually isn't closed as a duplicate so there's no duplicate banner.

The question linked was https://askubuntu.com/q/402315/176889

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This:

>[![enter image description here][1]](https://askubuntu.com/questions/402315/how-to-add-a-keyboard-modifier-state-applet-to-uniy-panel#comment516180_402315)

is **not** a duplicate banner. It is a [*comment*](https://askubuntu.com/help/privileges/comment), which was written by xangua.

For future reference, an actual duplicate banner can be seen [here](https://askubuntu.com/questions/55848/how-do-i-install-oracle-java-jdk-7) (and in *many* more questions). It is located under the question title and usually in yellow text.


  [1]: https://i.sstatic.net/mASCM.png