You get this error when opening a course, in this case we were using course 33. When entering the course, you get this error message:
“Cannot find data record in database table course_module”
Open MySQL Workbench on the server and then run this query:
select modinfo from mdl_course where id = <courseid>;
Then you should see the course record in the database, you need to clear the modinfo field that appears to force a cache refresh of the course to do this run:
update mdl_course set modinfo='' where id = <courseid>;
Once this is run try accessing the course again, you should find you can get in again.