Hi @erupnik,
Thanks for your patience – we’re a small team with a lot of competing priorities, and working with 3rd-party data is time-consuming! I’ve identified the problem and filed an issue here:
There are instructions for patching at the bottom of the page.
I encountered one further problem with your data (to do with the citations table). There’s a work-around documented here but in brief, execute the SQL DELETE FROM citations; before running the upgrade script, perform the upgrade, then run php lib/pkp/tools/parseCitations.php afterwards to re-generate the data.
Regards,
Alec Smecher
Public Knowledge Project Team