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 ('440a708c4f661a14e9c309385d3fd595', -1, 1714020392, 1714020392, '03105396', 0, 0, 0)

Line : 187
File : sessions.php