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Database error

A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was:

SELECT rev_id,rev_page,rev_text_id,rev_timestamp,rev_comment,rev_user_text,rev_user,rev_minor_edit,rev_deleted,rev_len,rev_parent_id,rev_sha1,page_namespace,page_title,page_id,page_latest,user_name FROM `whiteknightchronicles_revision` INNER JOIN `whiteknightchronicles_page` ON ((page_id = rev_page)) LEFT JOIN `whiteknightchronicles_user` ON ((rev_user != 0) AND (user_id = rev_user)) WHERE page_id = '1' AND rev_id = '17784' LIMIT 1

from within function "Revision::fetchFromConds". Database returned error "1054: Unknown column 'rev_sha1' in 'field list' (db1)".