That’s because that entry is not used anymore and has been removed in
https://github.com/discourse/discourse/commit/6c1c8be79433f87bef9d768da7b8fa4ec9bb18d7
I pushed a database migration to remove these useless user history entries
https://github.com/discourse/discourse/commit/c57a1b393f0fefb9e3094514fa03c9c5046cc6f9