Couldn't grade: Deadlock found when trying to get lock; try restarting transaction

Couldn't grade: Deadlock found when trying to get lock; try restarting transaction

by Tân Phan Sỹ -
Number of replies: 0

I got error when graded an assigment

Deadlock found when trying to get lock; try restarting transaction

UPDATE mdl_grade_items SET needsupdate = ? WHERE (itemtype='course' OR id=?) AND courseid=?

[array (
  0 => 1,
  1 => '48830',
  2 => '3127',
)]

Error code: dmlwriteexception
I use moodle 3.4. How to fix it ? Thank you very much!
Average of ratings: -