Imagine, you did data evaluation, published. When preparing your data for the thesis, you've realized that your approach was wrong. It does not change the main course of the paper and do not damage main conclusions, although it does affect the quantitative part of research. It is more than 1 year back published, so instead of erratum you decided that you put your updated data in your thesis and will do your best to address your mistakes in the next publication.
Question is how to formulate decent answers during the PhD defense if the committee asks why didn't you publish erratum/correction if you've made a mistake in your data evaluation?
Could I answer in a way "I've realized I've made a mistake and it will not happen again. The correction will not change main conclusions of the publication. I will make sure to address these points in the next publication concerning this topic to avoid any misunderstanding"
Maybe some other ideas?
Thanks in advance!