A comment from one of your examiners does not automatically become a correction that you have to make to your thesis. A correction you receive is not always something that needs to be commented on in the viva.
A comment doesn’t mean that something is “wrong” – it could be something interesting to talk about. A correction doesn’t mean that something is “wrong” either – it could be a typo or it could be needed to create a clearer piece of writing.
Comments and corrections have to be expected as part of the viva process. Your research and your thesis are not perfect and that’s OK.
You can expect to receive comments and corrections and also expect your examiners to think that your work is good.