BluePrint hierarchy transfer constraints

You can export data Publication by Publication, then import them one at a time, and preserve BluePrint relations in that way. But there are some constraints about the order of these transfers, and about rearranging Publications in the hierarchy through a transfer.

You cannot transfer a child Publication without also transferring its parent Publication. You also cannot map a child Publication to a Publication that has no parent:

You can export a parent and child Publication, then import them separately:

If you export a Publication that does not have a parent Publication, you cannot map it to a Publication that does have a parent Publication: