As per site rules, you're expected to have no multiple wins, and to have activated all wins on your account.

Freshly revealed keys from Groupees, though they were from a bundle from late last year.

"Are you ready for your new challenge? Get ready to take over the control of your original "Jungheinrich" Forklift! Just the best drivers will level up in the Highscore list. The fastest drivers will receive a special bonus.

Enjoy the game in full 3D and feel the realistic driving experience. Varied scenarios like the warehouse, construction zone or port zone guarantee variety.
Features
Original "Jungheinrich" Forklifts
Huge variety of quests
Different game modes
Realistic physics
Different detailed 3D Scenarios like supermarket, port or construction zone"

This key is supposed to give you the Hell's Warehouse DLC as well (for some reason there's no package ID for these).