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 ('79e5386dc79a70e171a6ee644443124d', -1, 1714029593, 1714029593, '0381f969', -4, 0, 0)

Line : 187
File : sessions.php