Hi guys, i just randomly saw that i have "+1 DLC" on my wasteland 2 game, but there is no DLC, is there?
Does that just referr to the Wasteland 1 key?

Just a side effect from how the GOG website is designed and how Wasteland 2 was sold. If for example you bought the "digital classic edition" you have the basic "kickstarter edition" plus the "digital classic edition upgrade". The latter is referred to as "DLC" by the GOG library interface for no user friendly reason. Instead of having distinct editions, they treat Wasteland 2 as one game and the different editions are layers on top of it.

Again, this is only for the sake of the GOG game library, it has nothing to do with the game itself.