When attempting a quiz, I encountered an error "Error writing to database", and found that it is due to insertion of unknown value 'NAN' in minfraction and maxfraction columns to table 'mdl_question_attempts'. The question type of the question is 'multianswers', and I am using Moodle 3.2.3.
What is minfraction and maxfraction, where can I set these values?
How to I solve this error?
You may find the attached image for the full error message.
