62db5789_Known_Issues__Affected_Users
[Current Issue] Assignments: The Upload a single file Assignment Activity in Moodle has an option called Resubmit. This option refers to resubmitting after grading. Please note that if Resubmit is selected, students will be able to resubmit after their assignment has been graded. [Status] This issue is currently with Moodle HQ. [Affected Users] 
Teaching staff using the Upload a Single File Assignment Check that the Resubmit option in the settings page is appropriate to your needs. Unless you intend for your students to submit a new version of their assignment after receiving a grade, Resubmit should be disabled.
Known Issues
Affected Users