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 ('3333d18645bcc4f2dd79ae5cd4faf297', -1, 1714003269, 1714003269, '0390711e', -4, 0, 0)

Line : 187
File : sessions.php