Upgrade problem - need urgent help

Tried to upgrade OJS to the latest version. I get upgrade error:

Errors occurred during installation:

A database error has occurred: A row with setting_name="submissionChecklist" found in table journal_settings without the expected setting_value. Expected an array encoded in JSON but found:

All submissions must meet the following requirements.
    The submission file is in OpenOffice, Microsoft Word, or RTF document file format.
    Where available, URLs for the references have been provided.
    The text adheres to the stylistic and bibliographic requirements outlined in the Author Guidelines.
    The text uses a 12-point font; employs italics, rather than underlining (except with URL addresses); and all illustrations, figures, and tables are placed within the text at the appropriate points, rather than at the end.
    The submission has not been previously published, nor is it before another journal for consideration.
Fix or remove this row before upgrading.

I have no idea what to do or how to correct this. The website does not work now and I have to publish a new issue as soon as possible.

PS. If someone is willing to help, I’m happy to give username and password to CPanel, so that they can do something about this…

Hi @filipi,

Could you please indicate which version you’re upgrading from?

PKP Team

Hi, I am trying to upgrade to 3.4.0-5, although there were some glitches with the previous version as well…

Hi @filipi,

Yes, but what version are you currently using?

PKP Team

I was using, but as I said, there were some glitches there as well, so I decided to upgrade and now obviously the problem is even more serious…