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 ('96bafc0a1de3130f85d15e5f65250d40', -1, 1748426947, 1748426947, '12d867db', -9, 0, 0)

Line : 190
File : sessions.php