phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('aa99a9ebdde1e63d998bfffe38b16807', -1, 1730414814, 1730414814, '038cbace', 6, 0, 0)

Line : 195
File : sessions.php