extensions/signals.py

@@ -43,10 +43,18 @@ def _delete_versionfiles_file(
     logger.info('Deleting File pk=%s of VersionFile pk=%s', file.pk, instance.pk)
     file.delete()
 
-    if instance.version.files.count() == 0:
-        # this was the last file, clean up the version
-        logger.info('Deleting Version pk=%s because its last file was deleted', instance.version.pk)
-        instance.version.delete()
+    # this code is already quite convoluted
+    # TODO? maybe find some way to have a predictable order of deletion
+    try:
+        if instance.version.files.count() == 0:
+            # this was the last file, clean up the version
+            logger.info(
+                'Deleting Version pk=%s because its last file was deleted',
+                instance.version.pk,
+            )
+            instance.version.delete()
+    except extensions.models.Version.DoesNotExist:
+        pass
 
 
 @receiver(pre_save, sender=extensions.models.Extension)