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 ('729108d3bdafe55ce1153272f41d035d', -1, 1714001549, 1714001549, '03913ca6', 2, 0, 0)

Line : 187
File : sessions.php