Firefox Monitor notified me of a data breach of an account that was deleted automatically due to inactivity by LiveJournal.com eight years ago. How come my e-mail still got in the data breach that supposedly happened three years ago in 2017 and has just been discovered? It says the breach included e-mails and passwords. I don't even remember what password I used back then and the account is deleted, so I can't log in anymore. Is there anything I should be concerned about? How is this even possible in the first place?