Comment is deleted
An admin PATCH on a comment failed because that row is already soft-deleted (deletedAt set). Public posters do not see this string.
Why this happens
Moderation UI or API tried to update a deleted comment. The product keeps the row but refuses further edits (409).
Diagnose and fix
1. Admin → Comments moderation — do not edit deleted items; restore if your UI supports it, or leave them deleted.
2. Post a new comment instead of editing the deleted one.
3. No site setting controls this message — it is lifecycle protection.
4. Distinct from Comments are disabled (feature off for everyone).