phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c9877726037a2cbca4e844686bf875d3' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('c9877726037a2cbca4e844686bf875d3', -1, 1771257789, 1771257789, 'd849d87b', 7, 0)

Line : 180
File : /www/includes/sessions.php