Hi @ipa,
Those values are incorrect for OJS 2.x too – it’s always been this way (as we’ve always used the same library toolset, such as ADODB).
However, even if these are set incorrectly, you shouldn’t introduce problems when you move from OJS 2.x to OJS 3.x – the same incorrect configuration should continue to work the same way. So I wonder if it’s possible that an additional problem was introduced during a database dump/load process?
I would suggest investigating this thread/post: Submission download unserialize() error at DAO.inc.php:350 - #6 by asmecher
Regards,
Alec Smecher
Public Knowledge Project Team