DB Error: Column 'load_id' cannot be null

i have error [DB Error: Column ‘load_id’ cannot be null] when upgrade ojs 2.4 to ojs 3.1.x

Hi @ciptoblues,

As a starting point you may want to search for that error here on the forum, there are other posts that do appear to feature users encountering that error. Another note, the recommended upgrade path from 2.4 is to upgrade to 3.2 - 3.1 (and older versions are no longer supported): How to Upgrade

PKP Team