Added is_naive check back to the LinkedTZDateTimeField.to_python() method.

Author: michaeljohnbarr

timezone_utils/fields.py

@@ -242,6 +242,9 @@ def to_python(self, value):
         if not value:
             return value
 
+        if is_naive(value):
+            return make_aware(value=value, timezone=self.timezone)
+
         return value.astimezone(self.timezone)
 
     def pre_save(self, model_instance, add):