pdoexception: sqlstate[23000]: integrity constraint violation: 1062 duplicate entry for key 'primary': insert into {node}

When ever i try to create new content on my site the site creashes and I get this string of errors

Notice: Undefined property: stdClass::$taxonomy in kwresearch_node_insert() (line 898 of /sites/all/modules/kwresearch/kwresearch.module).
Notice: Undefined offset: 1 in kwresearch_node_insert() (line 905 of /sites/all/modules/kwresearch/kwresearch.module).
Notice: Undefined variable: page_keyword_obj in kwresearch_node_insert() (line 911 of /sites/all/modules/kwresearch/kwresearch.module).
PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '70' for key 'PRIMARY': INSERT INTO {node} (nid, vid, type, language, title, uid, status, created, changed, comment, promote, sticky, tnid, translate) 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, :db_insert_placeholder_10, :db_insert_placeholder_11, :db_insert_placeholder_12, :db_insert_placeholder_13); Array ( [:db_insert_placeholder_0] => 70 [:db_insert_placeholder_1] => 71 [:db_insert_placeholder_2] => article [:db_insert_placeholder_3] => und [:db_insert_placeholder_4] => testinf [:db_insert_placeholder_5] => 1 [:db_insert_placeholder_6] => 1 [:db_insert_placeholder_7] => 1327613450 [:db_insert_placeholder_8] => 1327613450 [:db_insert_placeholder_9] => 0 [:db_insert_placeholder_10] => 1 [:db_insert_placeholder_11] => 0 [:db_insert_placeholder_12] => 0 [:db_insert_placeholder_13] => 0 ) in drupal_write_record() (line 6888 of /includes/common.inc).