I've played both Magic: the Gathering and Yu-Gi-Oh, which use erratum/errata to indicate corrections to how a card works. After looking erratum up in the dictionary I gravitate towards, I'm fairly sure it's an incorrect usage because erratum/errata seem(s) to refer to the error(s) rather than the correction(s). Is this usage correct? If not, what's the correct Latin to indicate the error's been fixed?