Those are pretty neat! I’m guessing the commenter who made the original statement was referring to countries so doubt this would invalidate their statement.

The country I see people saying that’s older is England, but with the monarch messes things up depending on definitions (the US constitution even mentions the king quite a few times so was England considered a democracy yet?).

It’s probably one of those things where the definition is loose enough that many different countries/organizations can claim to be the oldest and be right under whatever criteria they’ve decided