May 13, 2021
Django 3.1.11 fixes a regression in 3.1.9.
Fixed a regression in Django 3.1.9 where saving FileField would raise a SuspiciousFileOperation even when a custom upload_to returns a valid file path (#32718).
FileField
SuspiciousFileOperation
upload_to
Django 3.1.12 release notes
Django 3.1.10 release notes
Dec 25, 2023