Today I noticed that my price rules weren't working correctly, so I tried to reindex. I wasn't able to reindex, Magento said. When I looked it up I somewhere read that I should export the table
catalog_catagory_product_index with disable foreign key check checked and then import it back in. When I did that I got an error (I don't remember the exact error).
Now, some of my categories don't display products anymore. I have no idea what the problem might be. https://sportinngerritsen.nl/tennis