Column “method” cannot be null

I’m receiving this as the output of our cron scripts: <div id=”error”><p class=”wpdberror”> WordPress database error: [Column 'method' cannot be null]<br /> INSERT INTO prefix_nppp ( type , ajax , url , method , loggedIn , user , referer , userAgent , duration , RAM , queries , timeToFirstByte , DOMContentLoaded , load , requests ) VALUES ('cron', '', '', NULL, '', NULL, NULL, NULL, '12552', '42', '134', NULL, NULL, NULL, NULL)</p></div> The plugin should check that method is in the appropriate format (including not null) and handle the situation more gracefully.