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 ('4c4e04be4ce0cf3e3fc9e085809fb880', -1, 1714039265, 1714039265, '12bfba48', -9, 0, 0)

Line : 187
File : sessions.php