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 ('6b74c78e5492cb2b03c24e748e8a2993', -1, 1708795202, 1708795202, '03ef4c19', -1, 0, 0)

Line : 187
File : sessions.php