1.18.4 > 1.19 beta, savegame issues?

[Trin Tragula]

Should work afaik but as usual we can't make guarantees

I suspect nothing on that score will ever quite beat Portuguese Brazil being handed a province in Belarus.

Ah good old 1.8 where province IDs from the new world had to be reused on the other side of the globe
You're referring to Vitebsk if I remember correctly