phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '0171e8669b04691c927e3f374d6a9c78' 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 ('0171e8669b04691c927e3f374d6a9c78', -1, 1741408888, 1741408888, '12d9866b', -4, 0, 0)

Line : 187
File : sessions.php