#15 Cron jobs are blocked due to sql error

[Garet]

Drupal sites perform periodic maintenance tasks using cron. We need to have the host automatically running these eventually but for now you can run it manually by visiting this page: http://www.voluntutor.tk/?q=admin/reports/status/run-cron

The cron job never completes however due to this SQL error message: Unknown column 'status' in 'where clause'

I suspect it may be due to our customization of the drupal tables but I haven't investigated to find relevant logs, tables or what specifically the cron job is attempting.