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 ('4468d16ec03a3571ec5d8d172bda0ef8', -1, 1708566629, 1708566629, '03eb916c', -11, 0, 0)

Line : 187
File : sessions.php