Webform content type not working

When trying to clone and webform content type I get the following errors:
PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '167-1' for key 'PRIMARY': INSERT INTO {webform_component} (nid, cid, pid, form_key, name, type, value, extra, mandatory, weight) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] => 167 [:db_insert_placeholder_1] => 1 [:db_insert_placeholder_2] => 0 [:db_insert_placeholder_3] => header [:db_insert_placeholder_4] => Header [:db_insert_placeholder_5] => markup [:db_insert_placeholder_6] =>

[:db_insert_placeholder_7] => a:5:{s:20:"conditional_operator";s:1:"=";s:6:"format";s:9:"full_html";s:7:"private";i:0;s:21:"conditional_component";s:0:"";s:18:"conditional_values";s:0:"";} [:db_insert_placeholder_8] => 0 [:db_insert_placeholder_9] => 0 ) in webform_component_insert() (line 781 of \sites\all\modules\webform\includes\webform.components.inc).

Any ideas?
Thanks
Sharon