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 ('ecf9a8ad82a34e7eaa2ec600037db8d5', -1, 1713496865, 1713496865, '340edd71', -9, 0, 0)

Line : 187
File : sessions.php