phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('959835173e3a1f437e1419c636122a89', -1, 1715302517, 1715302517, '0390a0db', 4, 0, 0)

Line : 189
File : sessions.php