If you need a solution immediately, you can scrub the entire edit history for that post. Delete the key post:<pid>:diffs and all keys that start with diff:<pid>
e.g. redis-cli keys diff:123.* | xargs redis-cli DEL
How to add the Solved/Unsolved badge to NodeBB topics?
Hello @H7 -- you'll want to use the Q&A plugin: https://github.com/NodeBB/nodebb-plugin-question-and-answer
You can find it in the Plugins menu, or if not, then you can likely install it via npm.
@julian Thank you!