Could not insert search results

DEBUG MODE

SQL Error : 1062 Duplicate entry '1747686224' for key 'PRIMARY'

INSERT INTO phpbb_search_results (search_id, session_id, search_time, search_array) VALUES(1747686224, '0595270215813a8ef7ac7730aec9f391', 1714075824, 'a:7:{s:14:"search_results";s:313:"1364185, 1375708, 1377183, 1376451, 1376397, 1376214, 1375502, 1365913, 1378324, 1365917, 1379911, 1378326, 1365915, 1363619, 1375683, 1363750, 1363755, 1363782, 1376878, 1364980, 1375341, 1376632, 1381384, 1377311, 1377474, 1377818, 1379094, 1381782, 1393502, 1393749, 1394956, 1399543, 1399544, 1429071, 1446286";s:17:"total_match_count";i:35;s:12:"split_search";N;s:7:"sort_by";i:0;s:8:"sort_dir";s:4:"DESC";s:12:"show_results";s:5:"posts";s:12:"return_chars";i:200;}')

Line : 706
File : search.php