I beat that mission (game-)months ago.
Now it reappears and I can`t land on the site.
I reloaded the savegame, now I can do that mission a second time.
2 posts • Page 1 of 1
This is a known bug in 1.2 and will be fixed in 1.3. It will require a new campaign to go away completely though - you may still get extra DLC mission points of interest if you upgrade a 1.2 campaign.