A Database Error Occurred

Error Number: 1062

Duplicate entry 'a2bj2qnvc45ofc53cqdr1umemfncvn9n' for key 'PRIMARY'

INSERT INTO `ep_sessions` (`id`, `ip_address`, `timestamp`, `data`) VALUES ('a2bj2qnvc45ofc53cqdr1umemfncvn9n', '216.73.216.184', 1766650578, '__ci_last_regenerate|i:1766650578;current_page|s:44:\"event/2012-ironman-lake-placid/category/swim\";search_data|a:4:{s:5:\"start\";i:0;s:3:\"num\";i:2000;s:3:\"sub\";a:2:{s:5:\"event\";s:2:\"53\";s:8:\"category\";s:4:\"swim\";}s:5:\"order\";s:5:\"start\";}')

Filename: libraries/Session/drivers/Session_database_driver.php

Line Number: 236