I've already applied all solutions from this thread and this 32 BTC topic still I can see in unread (from time to time).
If you tried everything in this thread and it didn't work I don't think you did something right,
And additional if you recently made a post on that thread and in the "Additional options" in the down left corner of your message box/input box click on it and check if your "watch this topic" is marked blue, uncheck the box, because it automatically watches a thread for you without your noticed since it's on.
The image below 👇 is what I expected you to do the first post I would above.
However if you think none of this solution works for you the you have to ignore the thread manually, by not paying attention to it.
And however I also want to know where exactly you're getting this notifications from because we could be finding solution to your problem while it's somewhere else, maybe its not the forum it could be a tool you use for notification and we are here finding another place.
Yes, I did it and it does not help. As I said already few times I tried everything from this thread and it does not help. Please read before posting.