The ability to edit posts time out after 60 days to avoid spam and maintain continuity. There's a discussion of it on the Meta Discourse
https://meta.discourse.org/t/free-to-edit-post-at-any-time/35516
This is the primary record of the communication but it's not the only one. Many people have the full records in their emails as well. If there's a correction or update, I'd recommend sending a reply with the new information.
If there's a security issue or other critical issue please send me a private message and I can help you. From your description it doesn't sound this way, but if others find this that's also an option. Admins/moderators can help in these cases.
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[Visit Topic](
https://discourse.ros.org/t/some-posts-are-not-editable/4446/2) or reply to this email to respond.
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