How authentic is the report of Umar being corrected by a female?

There is a story that goes like this: Once the Second Caliph Umar, Omar bin Khattab told the people to not be excessive in mahr (bride price) and not to exceed four hundred dirhams. A woman protested and quoted Verse 4:20 of the Qur'an which says: >But if you want to replace one wife with another and you have given one of them a great amount [in gifts], do not take [back] from it anything. Would you take it in injustice and manifest sin? Caliph Omar immediately retracted his statement, saying that whoever wants to give an exorbitant mahr can give it. What is the authenticity of this hadith?