I'm trying to try out an ahistorical USA playthrough, but whenever I try to join an alliance the tooltip says that I'm already in an alliance. I've cancelled every non-trade diplomatic deal I have- NAPs, Alliances (even got rid of the Philippines and Liberia to kick them out of my alliance), even military access. But it's persists.
Is this hardcoded, a bug or what?
Is this hardcoded, a bug or what?