If you find the misspelling "mea 1" rather than "mea culpa", here are a few possible suggestions. Firstly, it could be a typographical error, so correcting it to "mea culpa" would be appropriate. Secondly, "mea maxima culpa" is another alternative that acknowledges a higher degree of blame. Lastly, "meant 1" could be an option, depending on the intended context.
