Could not insert search results

DEBUG MODE

SQL Error : 1062 Duplicate entry '217337474' for key 'PRIMARY'

INSERT INTO phpbb_search_results (search_id, session_id, search_time, search_array) VALUES(217337474, '77f5fc671e17fc4f9cd6796f4e6a779a', 1790537969, 'a:7:{s:14:"search_results";s:78:"501355, 501364, 501366, 501367, 501674, 501675, 501798, 503498, 503516, 506127";s:17:"total_match_count";i:10;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 : 781
File : search.php