旧情复燃的后果是从蹈覆辙
[jiù qíng fù rán de hòu guŏ shì cóng dăo fù zhé]
'Rekindling Old Love Will Repeat Mistakes,' highlights concerns about repeating past errors if previous feelings were reignited. It acknowledges knowing the history of a failed relationship may lead to falling into old patterns unless there's genuine change.