I was attempting to edit the top post of my Suggested Guide for Japanese Literacy and noticed now I cannot edit the first post and other older ones. I assume that you have the forum set-up to archive after 2 months.
Normally, this is not an issue. However course creators will likely be editing and adding information over time with regards to their course and they’ll want to do this to the top post as anything else will lost in all the comment replies. In addition, I link to the first post on other websites (mainly Reddit) and want it to have the most updated information.
Please consider removing the archive setting or at least don’t do it on Course Forum posts.