add-on Sci-Fi Card Series Add-On 2.2.0

I love this idea!  So many cards to collect just like it would have been during this time.  LOL.

The only problem I am having is putting the cards on the poster, it keeps telling me I can't put the SciFi Card on the SciFi poster, same with the other three, and the board game shelving unit.  Is there a fix for this?  It's not all the cards, just about 1/2 of them that I have come across and tried to add.

Cool idea, well done author:-)