This should not have caused the "organization_id": "commons" or "area": {"name": ""} to be added to any membership.
(I've also seen, but can't reproduce, an instance where the post_id for a person's membership disappeared, but I can't rule out that that might have been a bug in YourNextMP yet, or it might be due to the same cause as https://github.com/mysociety/popit/issues/729.)
This can be reproduced on the staging server at the moment. For example, if there was a person as follows:
... and after adding an identifier:
The diff between those is:
This should not have caused the
"organization_id": "commons"
or"area": {"name": ""}
to be added to any membership.(I've also seen, but can't reproduce, an instance where the post_id for a person's membership disappeared, but I can't rule out that that might have been a bug in YourNextMP yet, or it might be due to the same cause as https://github.com/mysociety/popit/issues/729.)