Results Give an Error after the entries are cleared.

After clearing the Results report of WebForm, I receive the following error message;

user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') ORDER BY sid ASC, cid ASC, no ASC' at line 1 query: SELECT s.*, sd.cid, sd.no, sd.data, u.name, u.mail, u.status FROM webform_submissions s LEFT JOIN webform_submitted_data sd ON sd.sid = s.sid LEFT JOIN users u ON u.uid = s.uid WHERE sd.nid = 16 AND s.sid IN () ORDER BY sid ASC, cid ASC, no ASC in /home3/xxxxx/public_html/website/sites/all/modules/webform/webform_submissions.inc on line 168.