no harm no foul

Translations
нет вреда, нет нарушения
Don't worry about it, it was an honest mistake; no harm no foul.
Не переживай, это была честная ошибка; нет вреда, нет нарушения.
Definitions
An expression meaning that if no real damage or injury has occurred, then there is no need to assign blame or punishment for a mistake or accident.