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 ('6fbec05b993d10cdd2177e2f81ffc3f8', -1, 1714073566, 1714073566, '0316b551', 5, 0, 0)

Line : 187
File : sessions.php