Board Thread:Support Requests - Community Management/@comment-5879271-20200712214105/@comment-34888194-20200712215536

You have dev:LockOldBlogs/code.js imported in your wiki’s ImportJS. According to the configuration in your wiki’s Mediawiki:Common.js, blogs that haven’t been commented for over 30 days will be locked. So here are the options:
 * 1) You can extend the expiration date in the configuration.
 * 2) Remove the import and that will allow users to comment blogs regardless of how long it hasn’t been commented. Of course, you can still disallow a blog comment by editing the page and uncheck “commenting”.

Otherwise, yes, you’ll need to create a new blog.