Can't drop 3kg of dead weight

In my inventory in precursors is 3 'packages' which each weigh 1kg, i don't know where they came from and i can't drop them. Apparently there mission objects but i have no mission which requires them.

I think i first saw them in my inventory shortly after going to the second planet (Gli?) for the first time.

I hope someone can help me with this problem as i could do with that extra 3kg of storage, not having it is ruining the game for me.

thanks in advance.

I will lower the weight of all undroppable quest items to 0.01 in the next patch version to avoid problems like this.