Could not insert search results

DEBUG MODE

SQL Error : 1062 Duplicate entry '1540394985' for key 'PRIMARY'

INSERT INTO nuke_bbsearch_results (search_id, session_id, search_array) VALUES('1540394985', 'e939b713acf7375a937b3ae16b19a294', 'a:7:{s:14:"search_results";s:97:"1204984, 1204994, 1205035, 1205044, 1205045, 1205146, 1205147, 1205353, 1205391, 1205449, 1205910";s:17:"total_match_count";i:11;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 : 568
File : /var/www/watchbus/public_html/modules/Forums/search.php