New "Solved Topic" feature on the forum

Cool new feature!

So cool I stared going back through my topics and marking them solved. (man do I have a lot of topics. I really should spend more time working and less time on this forum :stuck_out_tongue: ) I even got a chance to to try out the “unsolve” button :smiley: . But later I tried to unsolve something and the button wasn’t there :open_mouth: Is there some sort of limit to how old the thread can be before you can’t unsolve it anymore?