If I found there is an error in a quote I offered in my previous email, and then l rewrote the right price in a new mail, how to express the receiver should view the price as correct, the price in the previous is wrong.
I would start with something like
I am sorry (or another similar apology phrase). but there was (I made) an error in my previous email. The correct information is as follows...
I would put it like:
As for the price/quote I have offered in the previous email, please notice that $abc is wrong and $xyz is correct.