Why do you think that columns are missing? And when you say, Spartacus fetching dies with errors, I can't do anything without you telling me the errors.
What you need to do basically is:
1. Uninstall all remaining static page event plugins, if any
2. Delete the plugins/serendipity_event_staticpage directory
3. Re-install the staticpage plugin via Spartacus (if that still fails just download the files from
http://cvs.sourceforge.net/viewcvs.py/p ... staticpage)
4. Now after installing you must use a tool like phpMyAdmin to adjust staticpage plugin column structure manually. Since you deleted the plugin, I cannot reconstruct the "db_built" variable for your installation. Send me your current serendipity_staticpages structure DB dump and I'll tell you which SQL code to execute. All can be found in the "setupDB" function call inside the plugin if you want to do it on your own.
This is all a bit of trouble because the way you went with the plugin was not good and suggested.
Regards,
Garvin