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 ('8b9cfcef211ccf0a0033c80c474e6da0', -1, 1713990187, 1713990187, '12da267d', -2, 0, 0)

Line : 187
File : sessions.php