Fixed the save method of the LocalizedModel data model to find the l10n records only for existing models, to work with Django 4.1.

mia_core/models.py

@@ -126,6 +126,9 @@ class LocalizedModel(models.Model):
                         current_value = getattr(self, name + "_l10n")
                         if current_value is None or current_value == "":
                             setattr(self, name + "_l10n", new_value)
+                        if self.pk is None:
+                            l10n_rec = None
+                        else:
                             l10n_rec = self._get_l10n_set()\
                                 .filter(name=name, language=language)\
                                 .first()