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 ('aa71041164230e9b97a39d6b1a6973ea', -1, 1754860967, 1754860967, 'd849d8fd', 2, 0, 0)

Line : 189
File : sessions.php