After replacing all of the files that held the appropriate changes when updating from 2.0.14 to 2.0.15, I get the following error when I try to access the site. I downloaded and ran the install/update_to_latest.php file and then deleted the directory as required. I didn't modify the files but downloaded the new files that were to be changed and used the new files. I can't see how this could happen, but I'm not entirely sure what this error means or where to go to correct it.
phpBB : Critical Error
Error creating new session
SQL Error : 1054 Unknown column 'session_admin' in 'field list'
INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('301ad0521b9b8b08146aea8204333e47', 9, 1165955143, 1165955143, '409a1afb', 0, 1, 0)
Line : 172
File : sessions.php