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 ('7f60f4595cb5e8f9a44ae8d129ac4cd6', -1, 1634690500, 1634690500, '22e7f315', -7, 0, 0)

Line : 187
File : sessions.php