I was doing a template course upload to just copy a setting of one of my course into all the courses. It worked fine when i tested for 10 courses at a time.
But when I did for all, the webpage crashed and when I opened the site again I found all my courses out of their original categories and all the 1130 courses were piled up in a single category.
Please help me if I can revert this! I hope the situation is understandable