We have used a course template that has an course image file. This course template has been used around 5000 times.
With course image I mean the image you can upload under 'edit course settings'.
I need to replace the course image file for all of these courses at once. This seems not so easy, it looks every course made it's own copy of the file and stored it in the database.
Is this correct? Is there some hash that I could search for or are their other ways to replace this course image file?