repeating the same failure; making the same mistake again
Used in expressions like 二の舞を演じる or 二の舞になる to describe someone repeating another's blunder or misfortune. Often carries a cautionary tone.
彼は先輩の二の舞を演じて、同じミスでプロジェクトを遅らせた。
He repeated his senior's mistake and delayed the project with the same error.
Let's prepare thoroughly so we don't repeat the previous failure.