“Cuiusvis hominis est errare, nullius nisi insipientis in errore perseverare.” attributed to Marcus Tullius Cicero
“Anyone can err, but only the fool persists in his fault.”
“Any man can make a mistake, but only the unwise persists in his fault.” (insipientis = unwise; sapientia = wisdom)
Errare humanum est perseverare diabolicum
Please add other translations of this phrase in the comments sections.