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 ('0ebc8dc3909e69011b891f02f9b8a8dd', -1, 1714066976, 1714066976, '0a020003', 1, 0, 0)

Line : 187
File : sessions.php