phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '0af521b21e44838fb0b4b6f2c495c78f' 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 ('0af521b21e44838fb0b4b6f2c495c78f', -1, 1771248147, 1771248147, '0aff0001', 42, 0, 0)

Line : 199
File : sessions.php