I was exploring data in a Join I created in Tableau prep. I have a date field and I right clicked and selected Keep Only for 2018 data. I went on, made some other modifications, output the data, saved and closed. When I opened the data in Tableau, I realized that it had kept that filter and was only showing 2018 data. I tried to go back into Tableau Prep to undo but can't figure out how to do that now. Unlike doing a Clean it doesn't keep any sort of change log that you can edit and I can't use the Undo function since I saved and closed. Is there any way to undo this filter or do I just have to recreate the step?
Never mind, I figured it out. I tried to remove the join and add it back but the filter was still there so I went back to a previous clean step and it showed as a change there. I removed that change and it removed the filter. A little confusing but it worked.