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 ('e935076d75e307edb3d2506b1c40a5bf', -1, 1713526463, 1713526463, '0390e996', -9, 0, 0)

Line : 187
File : sessions.php