Update models.py

widget_CtrlF/announcement_board/models.py

@@ -14,7 +14,7 @@ class Announcement(models.Model):
     title = models.CharField(max_length=100)
     body = models.TextField(max_length=10000)
     author = models.ForeignKey(WidgetUser, on_delete=models.CASCADE)
-    pub_datetime = models.DateTimeField(default=timezone.now, null=True, blank=True, default=None)
+    pub_datetime = models.DateTimeField(default=timezone.now, null=True, blank=True)
 
     def __str__(self):
         return self.title