So I have this world, and I've played for four years in-game. Suddenly, the tutorial to destroy a tree pops up. I have already done this (obviously). I'm pretty sure this happened because I downloaded 1.0 (the first full release), and played on that for a few hours. After that, returning to 1.21 messed up my tutorial progress. I don't know how to get rid of it.
The photo attached is the tutorial showing on the pause screen, which I think is intentional.
You said you loaded 1.0, which resets your options file. The tutorial toasts are saved in your options file, so of course those reset as well when you loaded 1.0. To get rid of it, just break a log with your hand or a tool. This issue is invalid.