Could not insert search results

DEBUG MODE

SQL Error : 1062 Duplicate entry '1240162980' for key 'PRIMARY'

INSERT INTO phpbb_search_results (search_id, session_id, search_array) VALUES(1240162980, 'b2c1ad8ae9b05fcdbc2505f6e2c14b6f', 'a:7:{s:14:"search_results";s:1302:"6821, 6826, 6831, 6948, 6960, 7072, 7083, 7123, 7500, 7502, 7505, 7506, 7509, 7513, 7554, 7555, 7765, 7796, 7820, 7844, 7846, 8004, 8006, 8007, 8008, 8010, 8018, 8021, 8023, 8036, 8543, 8545, 8547, 8632, 8636, 8639, 8736, 8739, 8744, 8745, 8747, 8761, 8965, 8968, 9176, 9182, 9263, 9264, 9271, 9277, 9281, 9293, 9294, 9315, 9359, 9360, 9405, 9523, 9529, 9530, 9537, 9601, 9650, 9686, 9716, 9774, 9777, 9900, 9901, 9902, 9912, 9921, 9927, 9947, 9953, 10017, 10044, 10104, 10243, 10367, 10373, 10407, 10489, 10708, 10710, 10791, 10794, 10914, 10967, 11111, 11112, 11130, 11309, 11321, 11367, 11401, 11403, 11404, 11498, 11594, 11690, 11715, 11734, 11762, 11793, 11796, 11817, 11829, 11830, 11902, 11908, 11932, 11944, 12011, 12031, 12033, 12036, 12041, 12054, 12091, 12136, 12157, 12164, 12204, 12228, 12229, 12230, 12282, 12285, 12363, 12374, 12390, 12426, 12545, 12546, 12547, 12548, 12549, 12567, 12573, 12590, 12594, 12595, 12636, 12697, 12722, 12779, 12792, 12793, 12794, 12795, 12796, 12808, 12810, 12874, 12938, 12956, 13088, 13118, 13199, 13224, 13245, 13249, 13250, 13251, 13264, 13269, 13308, 13319, 13397, 13399, 13565, 13567, 13594, 13641, 13653, 14490, 14525, 14769, 15075, 15309, 15325, 15328, 15334, 15343, 15456, 15523, 15748, 16095, 16211, 16212, 16637, 16672, 16774, 17155, 17173, 17952";s:17:"total_match_count";i:197;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 : 700
File : search.php