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 ('8a4521b16d6606f0f1549bf95dc68d6b', -1, 1713976933, 1713976933, '0391177b', -9, 0, 0)

Line : 187
File : sessions.php