I had a wrong question in my question bank for a specific course, can I find all users who attempted this question and add 1 Mark for all of them, using Moodle admin, or using Database
Moodle version: 3.6.1+ 20181214
Thanks in Advance for your help
Awarding 1 mark for the question is possible, but not easy.
An alternative that is worth considering is changing the weight for the question to 0. If you so this, Moodle will re-scale the grade earned on the other questions. (Effectively, it replaced the mark for the bad question with the average mark on the other questions.) You make this change on the Quiz settings -> Edit quiz page.
If you want to change the mark for that question to 1 for all students, the safest way to do that is to go to Quiz settings -> Results -> Manual grading page. You will need to use the 'Also show questions that have been graded automatically' option, then you can change all the grades.