I published a peer-reviewed article several years ago. Recently when I look back on my paper, I suddenly realized there had a figure duplication problem in one of the main figures (That main figure has more than 20 sub-figures, I only have a duplication problem in two cases). What is worse, the original data is lost due to the broken laptop (This is a great lesson I have learned) so the original data is not available anymore.
However, (1) I can run an experiment again to show the same outcome; (2) this mistake does not hurt the main conclusion; (3) and the result has been validated by other groups. I am wondering in such a situation, should I talk with my mentor, rerun the experiment, update the figure, and ask for a correction for this paper. Or I should ask for a withdrawal since I can not provide the raw data anymore (I have seen the author retract their papers because of unavailable raw data e.g., https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2045615/).