Doing this denies the reader of context or purpose of said graph or figure. Many students choose to contact professional editors to help with this as they hold the relevant expertise to guide you on the correct path to creating a perfect discussion section that is ready for submission.
The length of the analysis chapter is usually quite long, so a wrap up of the key points at the end can help the reader digest your work. If you have not completed this process, you must do so before beginning to write.
Instead they might jump from one thought to another and might go off topic here and there.
Granted that at some point in the discussion you are going to have to link back to this previous research. See our pages: Analysing Qualitative Data and Simple Statistical Analysis for more information on analysing your results. You may also wish to make some recommendations for practice.
A full understanding of the limitations of your research is part of a good discussion section. Not only are you using information that you have already documented, you are telling a story in each of your sections which can be useful in qualitative research.