Some of our users are unable to see their course progress page. (they see a 500 internal error)
It’s got started happening just after I enabled Persistent Grades on our Open edX instance.
there is a multilevel error repeating in our error logs. you can see one block of them by following this link.
a part of the error message says:
MySQLdb._exceptions.IntegrityError: (1062, "Duplicate entry '3Hh/n7AUbv5mnoBtCTHE/4WYD5I=' for key 'hashed'")
Do you have any idea why this duplication could be happening?