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 ('b4a0c488796f0a0c32b7e8bc6b1d77a3', -1, 1714021268, 1714021268, '0391bfd6', 3, 0, 0)

Line : 187
File : sessions.php