I destructed the Security Drone Europa #6. It disappeared, but still #6 is open in the triumph. It is the last remaining Drone for the Europa triumph, but it didn't count. The Drone disappeared after I shooted it. So I can't shoot it again. I already tried closing and restarting the game and I also switched to other character, but nothing helps. The triumph doesn't unlock. Please help me before the new DLC. Thanks in advance. :)