Importing PubMedIDs - Integrity constraint violation

An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. Path: //batch?id=140&op=do StatusText: Service unavailable (with message) ResponseText: PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'vid' cannot be null: INSERT INTO {biblio_keyword} (kid, vid, nid) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2); Array ( [:db_insert_placeholder_0] => 74 [:db_insert_placeholder_1] => [:db_insert_placeholder_2] => 865 ) in biblio_insert_keywords() (line 186 of /var/www/html//sites/all/modules/biblio/includes/biblio.keywords.inc).