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 ('294e34e07320f3026479a261b1ab72ee', -1, 1714016733, 1714016733, '0310515e', 0, 0, 0)

Line : 187
File : sessions.php