phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f59b0905bd127729636322a7bd71b107' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f59b0905bd127729636322a7bd71b107', -1, 1406190460, 1406190460, '3211584a', -4, 0, 0)

Line : 187
File : sessions.php