phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '2797777b15873751891fc616e2a3ad03' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('2797777b15873751891fc616e2a3ad03', -1, 1771381815, 1771381815, 'd849d87b', -9, 0)

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