Sunbird was removed from the archives days before the release of lucid [0]. The app-install-data-ubuntu package has not been updated since then, which is why it is still being displayed in software-center.
[0] https://launchpad.net/ubuntu/lucid/+source/lightning-sunbird/0.9+nobinonly-0ubuntu3
Sunbird was removed from the archives days before the release of lucid [0]. The app-install- data-ubuntu package has not been updated since then, which is why it is still being displayed in software-center.
[0] https:/ /launchpad. net/ubuntu/ lucid/+ source/ lightning- sunbird/ 0.9+nobinonly- 0ubuntu3