Profile: Michael

Problem: We have already assigned all the contacts (children) to their organisation (parent), but there are a few contacts (children) which need more than one parent.

If we use the many-to-many relationship option, would we still have to go to every single contact and amend - even those which will only remain as before with one single parent organisation?

Solution: Yes, you would likely have to edit every Contact (to remove the current parent Organization association). Then you also have to create all the intermediary posts that link each Contact to each Organization. There are two ways you can do this, either by creating the Intermediary post directly and selecting both parent posts in its Post Relationship editor, or by using the Post Relationship editor in the parent Contact or Organization post's editor screen. So as you can see it's not as simple as just editing the Contact. It may be possible to write a custom SQL script that modifies the database directly, but there is not a good way to migrate existing relationships like this from wp-admin.