phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '40479f71e764e86136a2dfba4f83a2ad' 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 ('40479f71e764e86136a2dfba4f83a2ad', -1, 1785900806, 1785900806, 'd849d96a', 1, 0, 0)

Line : 187
File : sessions.php