Export of imported items

[dennmuel]

When an item is imported form orcid.org, edited and then published in eprints, it cannot be exported to orcid, because orcid.org has a different source associated with this items putcode.
A solution would be to use a POST statement instead of a PUT. Ideally, the item is matched e.g. via DOI and gets grouped together with the originally imported item.

However, the thrown errorcode 9021 is caught with a PUT here, because it can be provoked by other circumstances. Thus we need further criteria to discriminate the POST cases from the PUT cases.