Publicado originalmente por CharlesDarles:

so this may be an error on my part, but me and a friend decided to try out this mod, got past the first bit with the supply cart until we reached the second waystation, then ended for the night. The next day I wanted to play a bit more but also didn't want to progress more on that character without my friend so I started a second character and made it to the way station but then the cart and NPC weren't there. I'm wondering if this is because me and my friend didn't finish the quest on my first character.

World states are permanent and tied across all characters as a result of Starbound's engine jank, similar to how vanilla characters will appear in The Outpost even if you're on a new character if previous characters have completed their missions. GIC is heavily reliant on world states for keeping track of narrative progression and other important functions.

You will need to delete your universe.dat file from your /starbound/storage/universe/- folder in order to reset world states. Mind that this will also delete your bookmarks across ALL characters but there is no way to only delete one or the other.