It means that the premise they’re doing research on needs to be reevaluated. Most new research used his research as a baseline to conduct their own research. It means we need to redo the experiments that were related to the original papers but also it would be ideal to complete each piece of that assholes research over again to get the actual data and then rework all papers based off of the accurate data.
The problem is that thousands of research papers used this man’s data and all of them and the research inspired by them need to be retested with the knowledge of the erroneous data in the core information that formed the hypothesis in the first place.